155133020 has 72 divisors (see below), whose sum is σ = 380933280. Its totient is φ = 52913280.

The previous prime is 155132993. The next prime is 155133047. The reversal of 155133020 is 20331551.

155133020 is nontrivially palindromic in base 6.

155133020 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (155132993) and next prime (155133047).

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a junction number, because it is equal to n+sod(n) for n = 155132983 and 155133001.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 304526 + ... + 305034.

It is an arithmetic number, because the mean of its divisors is an integer number (5290740).

Almost surely, 2^155133020 is an apocalyptic number.

155133020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 155133020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (190466640).

155133020 is an abundant number, since it is smaller than the sum of its proper divisors (225800260).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

155133020 is a wasteful number, since it uses less digits than its factorization.

155133020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 843 (or 834 counting only the distinct ones).

The product of its (nonzero) digits is 450, while the sum is 20.

The square root of 155133020 is about 12455.2406640739. The cubic root of 155133020 is about 537.3221564146.

Adding to 155133020 its reverse (20331551), we get a palindrome (175464571).

The spelling of 155133020 in words is "one hundred fifty-five million, one hundred thirty-three thousand, twenty".