22331457 has 16 divisors (see below), whose sum is σ = 33495360. Its totient is φ = 14886180.

The previous prime is 22331453. The next prime is 22331471. The reversal of 22331457 is 75413322.

It is not a de Polignac number, because 22331457 - 2² = 22331453 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a self number, because there is not a number n which added to its sum of digits gives 22331457.

It is not an unprimeable number, because it can be changed into a prime (22331453) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2919 + ... + 7292.

It is an arithmetic number, because the mean of its divisors is an integer number (2093460).

Almost surely, 2^22331457 is an apocalyptic number.

22331457 is a gapful number since it is divisible by the number (27) formed by its first and last digit.

It is an amenable number.

22331457 is a deficient number, since it is larger than the sum of its proper divisors (11163903).

22331457 is an frugal number, since it uses more digits than its factorization.

22331457 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10232 (or 10214 counting only the distinct ones).

The product of its digits is 5040, while the sum is 27.

The square root of 22331457 is about 4725.6171025592. The cubic root of 22331457 is about 281.6041299177.

Adding to 22331457 its reverse (75413322), we get a palindrome (97744779).

The spelling of 22331457 in words is "twenty-two million, three hundred thirty-one thousand, four hundred fifty-seven".