155287025 has 12 divisors (see below), whose sum is σ = 199196700. Its totient is φ = 119945280.

The previous prime is 155287021. The next prime is 155287037. The reversal of 155287025 is 520782551.

It can be written as a sum of positive squares in 6 ways, for example, as 1129969 + 154157056 = 1063^2 + 12416^2 .

It is not a de Polignac number, because 155287025 - 2² = 155287021 is a prime.

It is a super-2 number, since 2×155287025² = 48228120266701250, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (155287021) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 106370 + ... + 107819.

It is an arithmetic number, because the mean of its divisors is an integer number (16599725).

Almost surely, 2^155287025 is an apocalyptic number.

It is an amenable number.

155287025 is a deficient number, since it is larger than the sum of its proper divisors (43909675).

155287025 is a wasteful number, since it uses less digits than its factorization.

155287025 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 214228 (or 214223 counting only the distinct ones).

The product of its (nonzero) digits is 28000, while the sum is 35.

The square root of 155287025 is about 12461.4214678744. The cubic root of 155287025 is about 537.4999026501.

The spelling of 155287025 in words is "one hundred fifty-five million, two hundred eighty-seven thousand, twenty-five".