22157438 has 8 divisors (see below), whose sum is σ = 33456720. Its totient is φ = 11005200.

The previous prime is 22157417. The next prime is 22157459. The reversal of 22157438 is 83475122.

It is an interprime number because it is at equal distance from previous prime (22157417) and next prime (22157459).

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

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 36383 + ... + 36986.

It is an arithmetic number, because the mean of its divisors is an integer number (4182090).

Almost surely, 2^22157438 is an apocalyptic number.

22157438 is a deficient number, since it is larger than the sum of its proper divisors (11299282).

22157438 is a wasteful number, since it uses less digits than its factorization.

22157438 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 73522.

The product of its digits is 13440, while the sum is 32.

The square root of 22157438 is about 4707.1687881358. The cubic root of 22157438 is about 280.8707501991.

The spelling of 22157438 in words is "twenty-two million, one hundred fifty-seven thousand, four hundred thirty-eight".