155131500 has 48 divisors (see below), whose sum is σ = 451747296. Its totient is φ = 41368000.

The previous prime is 155131429. The next prime is 155131507. The reversal of 155131500 is 5131551.

It is a hoax number, since the sum of its digits (21) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (155131507) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 50211 + ... + 53210.

It is an arithmetic number, because the mean of its divisors is an integer number (9411402).

Almost surely, 2^155131500 is an apocalyptic number.

155131500 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

155131500 is an abundant number, since it is smaller than the sum of its proper divisors (296615796).

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

155131500 is a wasteful number, since it uses less digits than its factorization.

155131500 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 103443 (or 103431 counting only the distinct ones).

The product of its (nonzero) digits is 375, while the sum is 21.

The square root of 155131500 is about 12455.1796454327. The cubic root of 155131500 is about 537.3204015070.

The spelling of 155131500 in words is "one hundred fifty-five million, one hundred thirty-one thousand, five hundred".