22431511513421 has 4 divisors (see below), whose sum is σ = 22432618661244. Its totient is φ = 22430404365600.

The previous prime is 22431511513399. The next prime is 22431511513483. The reversal of 22431511513421 is 12431511513422.

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

It can be written as a sum of positive squares in 2 ways, for example, as 2677166802025 + 19754344711396 = 1636205^2 + 4444586^2 .

It is a cyclic number.

It is not a de Polignac number, because 22431511513421 - 2³⁸ = 22156633606477 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22431511513721) 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, 553543520 + ... + 553584041.

It is an arithmetic number, because the mean of its divisors is an integer number (5608154665311).

Almost surely, 2^{22431511513421} is an apocalyptic number.

It is an amenable number.

22431511513421 is a deficient number, since it is larger than the sum of its proper divisors (1107147823).

22431511513421 is a wasteful number, since it uses less digits than its factorization.

22431511513421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1107147822.

The product of its digits is 28800, while the sum is 35.

Subtracting from 22431511513421 its reverse (12431511513422), we obtain a palindrome (9999999999999).

The spelling of 22431511513421 in words is "twenty-two trillion, four hundred thirty-one billion, five hundred eleven million, five hundred thirteen thousand, four hundred twenty-one".