155120000 has 160 divisors (see below), whose sum is σ = 442920720. Its totient is φ = 52992000.

The previous prime is 155119999. The next prime is 155120003. The reversal of 155120000 is 21551.

It is a tau number, because it is divible by the number of its divisors (160).

It is a Harshad number since it is a multiple of its sum of digits (14).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (155120003) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 559862 + ... + 560138.

Almost surely, 2^155120000 is an apocalyptic number.

155120000 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 155120000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (221460360).

155120000 is an abundant number, since it is smaller than the sum of its proper divisors (287800720).

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

155120000 is an frugal number, since it uses more digits than its factorization.

155120000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 318 (or 291 counting only the distinct ones).

The product of its (nonzero) digits is 50, while the sum is 14.

The square root of 155120000 is about 12454.7179815522. The cubic root of 155120000 is about 537.3071238741.

Adding to 155120000 its reverse (21551), we get a palindrome (155141551).

The spelling of 155120000 in words is "one hundred fifty-five million, one hundred twenty thousand".