213210022431 has 16 divisors (see below), whose sum is σ = 336094617600. Its totient is φ = 117633115488.

The previous prime is 213210022411. The next prime is 213210022469. The reversal of 213210022431 is 134220012312.

It is not a de Polignac number, because 213210022431 - 2¹³ = 213210014239 is a prime.

It is a super-2 number, since 2×213210022431² (a number of 23 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a junction number, because it is equal to n+sod(n) for n = 213210022398 and 213210022407.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (213210022411) 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, 175048671 + ... + 175049888.

It is an arithmetic number, because the mean of its divisors is an integer number (21005913600).

Almost surely, 2^213210022431 is an apocalyptic number.

213210022431 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

213210022431 is a deficient number, since it is larger than the sum of its proper divisors (122884595169).

213210022431 is a wasteful number, since it uses less digits than its factorization.

213210022431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 350098598.

The product of its (nonzero) digits is 576, while the sum is 21.

Adding to 213210022431 its reverse (134220012312), we get a palindrome (347430034743).

The spelling of 213210022431 in words is "two hundred thirteen billion, two hundred ten million, twenty-two thousand, four hundred thirty-one".