525455920 has 80 divisors (see below), whose sum is σ = 1337200128. Its totient is φ = 190437120.

The previous prime is 525455899. The next prime is 525455923. The reversal of 525455920 is 29554525.

It is a tau number, because it is divible by the number of its divisors (80).

It is a super-2 number, since 2×525455920² = 552207847726092800, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 525455920.

It is not an unprimeable number, because it can be changed into a prime (525455923) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 322147 + ... + 323773.

Almost surely, 2^525455920 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 525455920, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (668600064).

525455920 is an abundant number, since it is smaller than the sum of its proper divisors (811744208).

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

525455920 is a wasteful number, since it uses less digits than its factorization.

525455920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2018 (or 2012 counting only the distinct ones).

The product of its (nonzero) digits is 90000, while the sum is 37.

The square root of 525455920 is about 22922.8253057951. The cubic root of 525455920 is about 806.9477774746.

The spelling of 525455920 in words is "five hundred twenty-five million, four hundred fifty-five thousand, nine hundred twenty".