521213025 has 48 divisors (see below), whose sum is σ = 881818560. Its totient is φ = 271584000.

The previous prime is 521212999. The next prime is 521213057. The reversal of 521213025 is 520312125.

It is not a de Polignac number, because 521213025 - 2⁹ = 521212513 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 521212992 and 521213010.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 628311 + ... + 629139.

It is an arithmetic number, because the mean of its divisors is an integer number (18371220).

Almost surely, 2^521213025 is an apocalyptic number.

It is an amenable number.

521213025 is a deficient number, since it is larger than the sum of its proper divisors (360605535).

521213025 is a wasteful number, since it uses less digits than its factorization.

521213025 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1026 (or 1021 counting only the distinct ones).

The product of its (nonzero) digits is 600, while the sum is 21.

The square root of 521213025 is about 22830.0903414770. The cubic root of 521213025 is about 804.7699534261.

The spelling of 521213025 in words is "five hundred twenty-one million, two hundred thirteen thousand, twenty-five".