155969925 has 12 divisors (see below), whose sum is σ = 257870400. Its totient is φ = 83183920.

The previous prime is 155969909. The next prime is 155969927. The reversal of 155969925 is 529969551.

155969925 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 155969925 - 2⁴ = 155969909 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (155969927) 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, 1039725 + ... + 1039874.

It is an arithmetic number, because the mean of its divisors is an integer number (21489200).

Almost surely, 2^155969925 is an apocalyptic number.

155969925 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

155969925 is a deficient number, since it is larger than the sum of its proper divisors (101900475).

155969925 is a wasteful number, since it uses less digits than its factorization.

155969925 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2079612 (or 2079607 counting only the distinct ones).

The product of its digits is 1093500, while the sum is 51.

The square root of 155969925 is about 12488.7919752072. The cubic root of 155969925 is about 538.2866649428.

The spelling of 155969925 in words is "one hundred fifty-five million, nine hundred sixty-nine thousand, nine hundred twenty-five".