155261500 has 72 divisors (see below), whose sum is σ = 355079088. Its totient is φ = 59303200.

The previous prime is 155261473. The next prime is 155261501. The reversal of 155261500 is 5162551.

It is a super-2 number, since 2×155261500² = 48212266764500000, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (25).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (155261501) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 264207 + ... + 264793.

It is an arithmetic number, because the mean of its divisors is an integer number (4931654).

Almost surely, 2^155261500 is an apocalyptic number.

155261500 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 155261500, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (177539544).

155261500 is an abundant number, since it is smaller than the sum of its proper divisors (199817588).

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

155261500 is a wasteful number, since it uses less digits than its factorization.

155261500 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 652 (or 617 counting only the distinct ones).

The product of its (nonzero) digits is 1500, while the sum is 25.

The square root of 155261500 is about 12460.3972649350. The cubic root of 155261500 is about 537.4704508724.

The spelling of 155261500 in words is "one hundred fifty-five million, two hundred sixty-one thousand, five hundred".