22831681 has 2 divisors, whose sum is σ = 22831682. Its totient is φ = 22831680.

The previous prime is 22831661. The next prime is 22831727. The reversal of 22831681 is 18613822.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 19501056 + 3330625 = 4416^2 + 1825^2 .

It is a cyclic number.

It is not a de Polignac number, because 22831681 - 2⁹ = 22831169 is a prime.

It is a super-2 number, since 2×22831681² = 1042571314571522, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (22831621) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11415840 + 11415841.

It is an arithmetic number, because the mean of its divisors is an integer number (11415841).

Almost surely, 2^22831681 is an apocalyptic number.

It is an amenable number.

22831681 is a deficient number, since it is larger than the sum of its proper divisors (1).

22831681 is an equidigital number, since it uses as much as digits as its factorization.

22831681 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4608, while the sum is 31.

The square root of 22831681 is about 4778.2508305864. The cubic root of 22831681 is about 283.6912642113.

The spelling of 22831681 in words is "twenty-two million, eight hundred thirty-one thousand, six hundred eighty-one".