521273027342431 has 16 divisors (see below), whose sum is σ = 641667663020608. Its totient is φ = 412370963193600.

The previous prime is 521273027342401. The next prime is 521273027342503. The reversal of 521273027342431 is 134243720372125.

It is a cyclic number.

It is not a de Polignac number, because 521273027342431 - 2¹³ = 521273027334239 is a prime.

It is a super-2 number, since 2×521273027342431² (a number of 30 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (521273027342401) 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, 449686440 + ... + 450844141.

It is an arithmetic number, because the mean of its divisors is an integer number (40104228938788).

Almost surely, 2^{521273027342431} is an apocalyptic number.

521273027342431 is a deficient number, since it is larger than the sum of its proper divisors (120394635678177).

521273027342431 is a wasteful number, since it uses less digits than its factorization.

521273027342431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 900536962.

The product of its (nonzero) digits is 1693440, while the sum is 46.

The spelling of 521273027342431 in words is "five hundred twenty-one trillion, two hundred seventy-three billion, twenty-seven million, three hundred forty-two thousand, four hundred thirty-one".