525681900 has 126 divisors (see below), whose sum is σ = 1710549372. Its totient is φ = 140162400.

The previous prime is 525681899. The next prime is 525681901. The reversal of 525681900 is 9186525.

It is a happy number.

525681900 is a `hidden beast` number, since 5 + 2 + 568 + 1 + 90 + 0 = 666.

It is an interprime number because it is at equal distance from previous prime (525681899) and next prime (525681901).

It is a super-2 number, since 2×525681900² = 552682919975220000, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is not an unprimeable number, because it can be changed into a prime (525681901) by changing a digit.

It is a polite number, since it can be written in 41 ways as a sum of consecutive naturals, for example, 69295 + ... + 76505.

Almost surely, 2^525681900 is an apocalyptic number.

525681900 is a gapful number since it is divisible by the number (50) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 525681900, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (855274686).

525681900 is an abundant number, since it is smaller than the sum of its proper divisors (1184867472).

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

525681900 is a wasteful number, since it uses less digits than its factorization.

525681900 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7243 (or 7221 counting only the distinct ones).

The product of its (nonzero) digits is 21600, while the sum is 36.

The square root of 525681900 is about 22927.7539240110. The cubic root of 525681900 is about 807.0634407914.

The spelling of 525681900 in words is "five hundred twenty-five million, six hundred eighty-one thousand, nine hundred".