22157770 has 8 divisors (see below), whose sum is σ = 39884004. Its totient is φ = 8863104.

The previous prime is 22157767. The next prime is 22157789. The reversal of 22157770 is 7775122.

It can be written as a sum of positive squares in 2 ways, for example, as 17918289 + 4239481 = 4233^2 + 2059^2 .

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

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 in 3 ways as a sum of consecutive naturals, for example, 1107879 + ... + 1107898.

Almost surely, 2^22157770 is an apocalyptic number.

22157770 is a deficient number, since it is larger than the sum of its proper divisors (17726234).

22157770 is a wasteful number, since it uses less digits than its factorization.

22157770 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2215784.

The product of its (nonzero) digits is 6860, while the sum is 31.

The square root of 22157770 is about 4707.2040533633. The cubic root of 22157770 is about 280.8721530181.

The spelling of 22157770 in words is "twenty-two million, one hundred fifty-seven thousand, seven hundred seventy".