22705131 has 8 divisors (see below), whose sum is σ = 30341584. Its totient is φ = 15102720.

The previous prime is 22705129. The next prime is 22705139. The reversal of 22705131 is 13150722.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 22705131 - 2¹ = 22705129 is a prime.

It is a super-2 number, since 2×22705131² = 1031045947454322, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 22705098 and 22705107.

It is not an unprimeable number, because it can be changed into a prime (22705139) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6910 + ... + 9651.

It is an arithmetic number, because the mean of its divisors is an integer number (3792698).

Almost surely, 2^22705131 is an apocalyptic number.

22705131 is a deficient number, since it is larger than the sum of its proper divisors (7636453).

22705131 is a wasteful number, since it uses less digits than its factorization.

22705131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17021.

The product of its (nonzero) digits is 420, while the sum is 21.

The square root of 22705131 is about 4764.9901364011. The cubic root of 22705131 is about 283.1661508149.

Adding to 22705131 its reverse (13150722), we get a palindrome (35855853).

The spelling of 22705131 in words is "twenty-two million, seven hundred five thousand, one hundred thirty-one".