521213695 has 16 divisors (see below), whose sum is σ = 673708032. Its totient is φ = 385973280.

The previous prime is 521213687. The next prime is 521213711. The reversal of 521213695 is 596312125.

It is not a de Polignac number, because 521213695 - 2³ = 521213687 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 521213695.

It is a congruent number.

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, 69537 + ... + 76666.

It is an arithmetic number, because the mean of its divisors is an integer number (42106752).

Almost surely, 2^521213695 is an apocalyptic number.

521213695 is a deficient number, since it is larger than the sum of its proper divisors (152494337).

521213695 is a wasteful number, since it uses less digits than its factorization.

521213695 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 146262.

The product of its digits is 16200, while the sum is 34.

The square root of 521213695 is about 22830.1050150892. The cubic root of 521213695 is about 804.7702982600.

The spelling of 521213695 in words is "five hundred twenty-one million, two hundred thirteen thousand, six hundred ninety-five".