521894234220 has 48 divisors (see below), whose sum is σ = 1478909940480. Its totient is φ = 137495025856.

The previous prime is 521894234209. The next prime is 521894234231. The reversal of 521894234220 is 22432498125.

It is an interprime number because it is at equal distance from previous prime (521894234209) and next prime (521894234231).

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, 52394040 + ... + 52403999.

It is an arithmetic number, because the mean of its divisors is an integer number (30810623760).

Almost surely, 2^521894234220 is an apocalyptic number.

It is an amenable number.

521894234220 is an abundant number, since it is smaller than the sum of its proper divisors (957015706260).

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

521894234220 is a wasteful number, since it uses less digits than its factorization.

521894234220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 104798134 (or 104798132 counting only the distinct ones).

The product of its (nonzero) digits is 276480, while the sum is 42.

The spelling of 521894234220 in words is "five hundred twenty-one billion, eight hundred ninety-four million, two hundred thirty-four thousand, two hundred twenty".