22454157 has 16 divisors (see below), whose sum is σ = 32739840. Its totient is φ = 13575600.

The previous prime is 22454147. The next prime is 22454171. The reversal of 22454157 is 75145422.

It is not a de Polignac number, because 22454157 - 2⁸ = 22453901 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22454147) 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, 26344 + ... + 27182.

It is an arithmetic number, because the mean of its divisors is an integer number (2046240).

Almost surely, 2^22454157 is an apocalyptic number.

It is an amenable number.

22454157 is a deficient number, since it is larger than the sum of its proper divisors (10285683).

22454157 is a wasteful number, since it uses less digits than its factorization.

22454157 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1664.

The product of its digits is 11200, while the sum is 30.

The square root of 22454157 is about 4738.5817498488. The cubic root of 22454157 is about 282.1189453461.

Adding to 22454157 its reverse (75145422), we get a palindrome (97599579).

It can be divided in two parts, 2245415 and 7, that added together give a palindrome (2245422).

The spelling of 22454157 in words is "twenty-two million, four hundred fifty-four thousand, one hundred fifty-seven".