13122431 has 4 divisors (see below), whose sum is σ = 14997072. Its totient is φ = 11247792.

The previous prime is 13122409. The next prime is 13122437. The reversal of 13122431 is 13422131.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-13122431 is a prime.

It is a super-2 number, since 2×13122431² = 344396390699522, which contains 22 as substring.

It is a Duffinian number.

It is a plaindrome in base 12.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13122437) 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, 937310 + ... + 937323.

It is an arithmetic number, because the mean of its divisors is an integer number (3749268).

Almost surely, 2^13122431 is an apocalyptic number.

13122431 is a deficient number, since it is larger than the sum of its proper divisors (1874641).

13122431 is an equidigital number, since it uses as much as digits as its factorization.

13122431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1874640.

The product of its digits is 144, while the sum is 17.

The square root of 13122431 is about 3622.4896135117. The cubic root of 13122431 is about 235.8693078455.

Adding to 13122431 its reverse (13422131), we get a palindrome (26544562).

The spelling of 13122431 in words is "thirteen million, one hundred twenty-two thousand, four hundred thirty-one".