22231157 has 8 divisors (see below), whose sum is σ = 23984184. Its totient is φ = 20484288.

The previous prime is 22231151. The next prime is 22231169. The reversal of 22231157 is 75113222.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 3964081 + 18267076 = 1991^2 + 4274^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 22231157 - 2²⁴ = 5453941 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 (22231151) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8363 + ... + 10695.

It is an arithmetic number, because the mean of its divisors is an integer number (2998023).

Almost surely, 2^22231157 is an apocalyptic number.

It is an amenable number.

22231157 is a deficient number, since it is larger than the sum of its proper divisors (1753027).

22231157 is a wasteful number, since it uses less digits than its factorization.

22231157 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3079.

The product of its digits is 840, while the sum is 23.

The square root of 22231157 is about 4714.9927889659. The cubic root of 22231157 is about 281.1818961357.

Adding to 22231157 its reverse (75113222), we get a palindrome (97344379).

The spelling of 22231157 in words is "twenty-two million, two hundred thirty-one thousand, one hundred fifty-seven".