13022431 has 4 divisors (see below), whose sum is σ = 13299552. Its totient is φ = 12745312.

The previous prime is 13022423. The next prime is 13022441. The reversal of 13022431 is 13422031.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 13022431 - 2³ = 13022423 is a prime.

It is a super-2 number, since 2×13022431² = 339167418299522, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13022441) 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, 138490 + ... + 138583.

It is an arithmetic number, because the mean of its divisors is an integer number (3324888).

Almost surely, 2^13022431 is an apocalyptic number.

13022431 is a deficient number, since it is larger than the sum of its proper divisors (277121).

13022431 is an equidigital number, since it uses as much as digits as its factorization.

13022431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 277120.

The product of its (nonzero) digits is 144, while the sum is 16.

The square root of 13022431 is about 3608.6605548319. The cubic root of 13022431 is about 235.2686289829.

Adding to 13022431 its reverse (13422031), we get a palindrome (26444462).

The spelling of 13022431 in words is "thirteen million, twenty-two thousand, four hundred thirty-one".