22831157 has 4 divisors (see below), whose sum is σ = 23823840. Its totient is φ = 21838476.

The previous prime is 22831139. The next prime is 22831169. The reversal of 22831157 is 75113822.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 22831157 - 2⁸ = 22830901 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22831117) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 496307 + ... + 496352.

It is an arithmetic number, because the mean of its divisors is an integer number (5955960).

Almost surely, 2^22831157 is an apocalyptic number.

It is an amenable number.

22831157 is a deficient number, since it is larger than the sum of its proper divisors (992683).

22831157 is an equidigital number, since it uses as much as digits as its factorization.

22831157 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 992682.

The product of its digits is 3360, while the sum is 29.

The square root of 22831157 is about 4778.1959984915. The cubic root of 22831157 is about 283.6890939030.

Adding to 22831157 its reverse (75113822), we get a palindrome (97944979).

The spelling of 22831157 in words is "twenty-two million, eight hundred thirty-one thousand, one hundred fifty-seven".