525155920 has 20 divisors (see below), whose sum is σ = 1220987700. Its totient is φ = 210062336.

The previous prime is 525155909. The next prime is 525155923. The reversal of 525155920 is 29551525.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 175615504 + 349540416 = 13252^2 + 18696^2 .

It is a tau number, because it is divible by the number of its divisors (20).

It is a super-2 number, since 2×525155920² = 551577480622092800, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (525155923) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3282145 + ... + 3282304.

It is an arithmetic number, because the mean of its divisors is an integer number (61049385).

Almost surely, 2^525155920 is an apocalyptic number.

It is an amenable number.

525155920 is an abundant number, since it is smaller than the sum of its proper divisors (695831780).

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

525155920 is a wasteful number, since it uses less digits than its factorization.

525155920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6564462 (or 6564456 counting only the distinct ones).

The product of its (nonzero) digits is 22500, while the sum is 34.

The square root of 525155920 is about 22916.2806755372. The cubic root of 525155920 is about 806.7941772645.

The spelling of 525155920 in words is "five hundred twenty-five million, one hundred fifty-five thousand, nine hundred twenty".