22157882 has 4 divisors (see below), whose sum is σ = 33236826. Its totient is φ = 11078940.

The previous prime is 22157879. The next prime is 22157897. The reversal of 22157882 is 28875122.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 28875122 = 2 ⋅14437561.

It can be written as a sum of positive squares in only one way, i.e., 18241441 + 3916441 = 4271^2 + 1979^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5539469 + ... + 5539472.

Almost surely, 2^22157882 is an apocalyptic number.

22157882 is a deficient number, since it is larger than the sum of its proper divisors (11078944).

22157882 is a wasteful number, since it uses less digits than its factorization.

22157882 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11078943.

The product of its digits is 17920, while the sum is 35.

The square root of 22157882 is about 4707.2159500070. The cubic root of 22157882 is about 280.8726262550.

The spelling of 22157882 in words is "twenty-two million, one hundred fifty-seven thousand, eight hundred eighty-two".