22157042 has 4 divisors (see below), whose sum is σ = 33235566. Its totient is φ = 11078520.

The previous prime is 22157011. The next prime is 22157053. The reversal of 22157042 is 24075122.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 14600041 + 7557001 = 3821^2 + 2749^2 .

It is a junction number, because it is equal to n+sod(n) for n = 22156999 and 22157017.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5539259 + ... + 5539262.

Almost surely, 2^22157042 is an apocalyptic number.

22157042 is a deficient number, since it is larger than the sum of its proper divisors (11078524).

22157042 is a wasteful number, since it uses less digits than its factorization.

22157042 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11078523.

The product of its (nonzero) digits is 1120, while the sum is 23.

The square root of 22157042 is about 4707.1267244467. The cubic root of 22157042 is about 280.8690769389.

The spelling of 22157042 in words is "twenty-two million, one hundred fifty-seven thousand, forty-two".