521373631271 has 16 divisors (see below), whose sum is σ = 534958966080. Its totient is φ = 507830373120.

The previous prime is 521373631237. The next prime is 521373631309. The reversal of 521373631271 is 172136373125.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-521373631271 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (41).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (521373631231) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 98202965 + ... + 98208273.

It is an arithmetic number, because the mean of its divisors is an integer number (33434935380).

Almost surely, 2^521373631271 is an apocalyptic number.

521373631271 is a deficient number, since it is larger than the sum of its proper divisors (13585334809).

521373631271 is a wasteful number, since it uses less digits than its factorization.

521373631271 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8794.

The product of its digits is 158760, while the sum is 41.

The spelling of 521373631271 in words is "five hundred twenty-one billion, three hundred seventy-three million, six hundred thirty-one thousand, two hundred seventy-one".