155907081 has 24 divisors (see below), whose sum is σ = 247118976. Its totient is φ = 93932640.

The previous prime is 155907043. The next prime is 155907097. The reversal of 155907081 is 180709551.

It is not a de Polignac number, because 155907081 - 2⁷ = 155906953 is a prime.

It is a super-2 number, since 2×155907081² = 48614035811881122, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (155907001) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 12576 + ... + 21678.

It is an arithmetic number, because the mean of its divisors is an integer number (10296624).

Almost surely, 2^155907081 is an apocalyptic number.

155907081 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

155907081 is a deficient number, since it is larger than the sum of its proper divisors (91211895).

155907081 is a wasteful number, since it uses less digits than its factorization.

155907081 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9293 (or 9290 counting only the distinct ones).

The product of its (nonzero) digits is 12600, while the sum is 36.

The square root of 155907081 is about 12486.2757057499. The cubic root of 155907081 is about 538.2143590553.

The spelling of 155907081 in words is "one hundred fifty-five million, nine hundred seven thousand, eighty-one".