22157230 has 32 divisors (see below), whose sum is σ = 42233760. Its totient is φ = 8346240.

The previous prime is 22157207. The next prime is 22157263. The reversal of 22157230 is 3275122.

It is a congruent number.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 52420 + ... + 52840.

It is an arithmetic number, because the mean of its divisors is an integer number (1319805).

Almost surely, 2^22157230 is an apocalyptic number.

22157230 is a deficient number, since it is larger than the sum of its proper divisors (20076530).

22157230 is a wasteful number, since it uses less digits than its factorization.

22157230 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 724.

The product of its (nonzero) digits is 840, while the sum is 22.

The square root of 22157230 is about 4707.1466941237. The cubic root of 22157230 is about 280.8698713174.

The spelling of 22157230 in words is "twenty-two million, one hundred fifty-seven thousand, two hundred thirty".