155525725 has 12 divisors (see below), whose sum is σ = 193177120. Its totient is φ = 124210800.

The previous prime is 155525717. The next prime is 155525731. The reversal of 155525725 is 527525551.

It is not a de Polignac number, because 155525725 - 2³ = 155525717 is a prime.

It is a super-2 number, since 2×155525725² = 48376502273551250, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 10846 + ... + 20704.

Almost surely, 2^155525725 is an apocalyptic number.

It is an amenable number.

155525725 is a deficient number, since it is larger than the sum of its proper divisors (37651395).

155525725 is an equidigital number, since it uses as much as digits as its factorization.

155525725 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10500 (or 10495 counting only the distinct ones).

The product of its digits is 87500, while the sum is 37.

The square root of 155525725 is about 12470.9953492093. The cubic root of 155525725 is about 537.7751682822.

The spelling of 155525725 in words is "one hundred fifty-five million, five hundred twenty-five thousand, seven hundred twenty-five".