22811157 has 12 divisors (see below), whose sum is σ = 33035340. Its totient is φ = 15167808.

The previous prime is 22811149. The next prime is 22811167. The reversal of 22811157 is 75111822.

It can be written as a sum of positive squares in 2 ways, for example, as 15634116 + 7177041 = 3954^2 + 2679^2 .

It is not a de Polignac number, because 22811157 - 2³ = 22811149 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 22811157.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22811137) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 583 + ... + 6779.

It is an arithmetic number, because the mean of its divisors is an integer number (2752945).

Almost surely, 2^22811157 is an apocalyptic number.

It is an amenable number.

22811157 is a deficient number, since it is larger than the sum of its proper divisors (10224183).

22811157 is a wasteful number, since it uses less digits than its factorization.

22811157 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6612 (or 6609 counting only the distinct ones).

The product of its digits is 1120, while the sum is 27.

The square root of 22811157 is about 4776.1026999008. The cubic root of 22811157 is about 283.6062328749.

Adding to 22811157 its reverse (75111822), we get a palindrome (97922979).

The spelling of 22811157 in words is "twenty-two million, eight hundred eleven thousand, one hundred fifty-seven".