521364056371 has 4 divisors (see below), whose sum is σ = 533488801912. Its totient is φ = 509239310832.

The previous prime is 521364056321. The next prime is 521364056399. The reversal of 521364056371 is 173650463125.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 521364056371 - 2¹⁹ = 521363532083 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (43), and also a Moran number because the ratio is a prime number: 12124745497 = 521364056371 / (5 + 2 + 1 + 3 + 6 + 4 + 0 + 5 + 6 + 3 + 7 + 1).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (521364056321) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6062372706 + ... + 6062372791.

It is an arithmetic number, because the mean of its divisors is an integer number (133372200478).

Almost surely, 2^521364056371 is an apocalyptic number.

521364056371 is a deficient number, since it is larger than the sum of its proper divisors (12124745541).

521364056371 is a wasteful number, since it uses less digits than its factorization.

521364056371 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12124745540.

The product of its (nonzero) digits is 453600, while the sum is 43.

The spelling of 521364056371 in words is "five hundred twenty-one billion, three hundred sixty-four million, fifty-six thousand, three hundred seventy-one".