525421644 has 48 divisors (see below), whose sum is σ = 1368554880. Its totient is φ = 155514240.

The previous prime is 525421639. The next prime is 525421657. The reversal of 525421644 is 446124525.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 40609 + ... + 51960.

It is an arithmetic number, because the mean of its divisors is an integer number (28511560).

Almost surely, 2^525421644 is an apocalyptic number.

It is an amenable number.

525421644 is an abundant number, since it is smaller than the sum of its proper divisors (843133236).

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

525421644 is a wasteful number, since it uses less digits than its factorization.

525421644 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 92630 (or 92628 counting only the distinct ones).

The product of its digits is 38400, while the sum is 33.

The square root of 525421644 is about 22922.0776545234. The cubic root of 525421644 is about 806.9302310973.

The spelling of 525421644 in words is "five hundred twenty-five million, four hundred twenty-one thousand, six hundred forty-four".