22404157 has 4 divisors (see below), whose sum is σ = 22425856. Its totient is φ = 22382460.

The previous prime is 22404149. The next prime is 22404209. The reversal of 22404157 is 75140422.

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 22404157 - 2³ = 22404149 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 (22404757) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9219 + ... + 11392.

It is an arithmetic number, because the mean of its divisors is an integer number (5606464).

Almost surely, 2^22404157 is an apocalyptic number.

It is an amenable number.

22404157 is a deficient number, since it is larger than the sum of its proper divisors (21699).

22404157 is a wasteful number, since it uses less digits than its factorization.

22404157 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21698.

The product of its (nonzero) digits is 2240, while the sum is 25.

The square root of 22404157 is about 4733.3029693862. The cubic root of 22404157 is about 281.9093860735.

Adding to 22404157 its reverse (75140422), we get a palindrome (97544579).

It can be divided in two parts, 2240415 and 7, that added together give a palindrome (2240422).

The spelling of 22404157 in words is "twenty-two million, four hundred four thousand, one hundred fifty-seven".