22013431 has 16 divisors (see below), whose sum is σ = 24727680. Its totient is φ = 19427680.

The previous prime is 22013423. The next prime is 22013477. The reversal of 22013431 is 13431022.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 22013431 - 2³ = 22013423 is a prime.

It is a super-2 number, since 2×22013431² = 969182288783522, which contains 22 as substring.

It is a Duffinian number.

22013431 is a modest number, since divided by 13431 gives 22 as remainder.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22013491) 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, 69285 + ... + 69601.

It is an arithmetic number, because the mean of its divisors is an integer number (1545480).

Almost surely, 2^22013431 is an apocalyptic number.

22013431 is a deficient number, since it is larger than the sum of its proper divisors (2714249).

22013431 is a wasteful number, since it uses less digits than its factorization.

22013431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 494.

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

The square root of 22013431 is about 4691.8472907800. The cubic root of 22013431 is about 280.2609429660.

Adding to 22013431 its reverse (13431022), we get a palindrome (35444453).

The spelling of 22013431 in words is "twenty-two million, thirteen thousand, four hundred thirty-one".