521422513431 has 16 divisors (see below), whose sum is σ = 722622681984. Its totient is φ = 334145062944.

The previous prime is 521422513411. The next prime is 521422513471. The reversal of 521422513431 is 134315224125.

It is not a de Polignac number, because 521422513431 - 2⁵ = 521422513399 is a prime.

It is a super-2 number, since 2×521422513431² (a number of 24 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 521422513392 and 521422513401.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (521422513411) 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, 28288981 + ... + 28307406.

It is an arithmetic number, because the mean of its divisors is an integer number (45163917624).

Almost surely, 2^521422513431 is an apocalyptic number.

521422513431 is a deficient number, since it is larger than the sum of its proper divisors (201200168553).

521422513431 is a wasteful number, since it uses less digits than its factorization.

521422513431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 56596510.

The product of its digits is 28800, while the sum is 33.

Adding to 521422513431 its reverse (134315224125), we get a palindrome (655737737556).

The spelling of 521422513431 in words is "five hundred twenty-one billion, four hundred twenty-two million, five hundred thirteen thousand, four hundred thirty-one".