521156217045 has 32 divisors (see below), whose sum is σ = 862645158144. Its totient is φ = 268485824000.

The previous prime is 521156217007. The next prime is 521156217091. The reversal of 521156217045 is 540712651125.

It is not a de Polignac number, because 521156217045 - 2²⁹ = 520619346133 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 521156216994 and 521156217012.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 4132977 + ... + 4257206.

It is an arithmetic number, because the mean of its divisors is an integer number (26957661192).

Almost surely, 2^521156217045 is an apocalyptic number.

It is an amenable number.

521156217045 is a deficient number, since it is larger than the sum of its proper divisors (341488941099).

521156217045 is a wasteful number, since it uses less digits than its factorization.

521156217045 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8390333.

The product of its (nonzero) digits is 84000, while the sum is 39.

The spelling of 521156217045 in words is "five hundred twenty-one billion, one hundred fifty-six million, two hundred seventeen thousand, forty-five".