521363438 has 16 divisors (see below), whose sum is σ = 802102176. Its totient is φ = 254061600.

The previous prime is 521363431. The next prime is 521363461. The reversal of 521363438 is 834363125.

It is a junction number, because it is equal to n+sod(n) for n = 521363398 and 521363407.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (521363431) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 281 + ... + 32292.

It is an arithmetic number, because the mean of its divisors is an integer number (50131386).

Almost surely, 2^521363438 is an apocalyptic number.

521363438 is a deficient number, since it is larger than the sum of its proper divisors (280738738).

521363438 is a wasteful number, since it uses less digits than its factorization.

521363438 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32779.

The product of its digits is 51840, while the sum is 35.

The square root of 521363438 is about 22833.3842870478. The cubic root of 521363438 is about 804.8473601773.

The spelling of 521363438 in words is "five hundred twenty-one million, three hundred sixty-three thousand, four hundred thirty-eight".