891022057 has 16 divisors (see below), whose sum is σ = 929111040. Its totient is φ = 853574400.

The previous prime is 891022039. The next prime is 891022073. The reversal of 891022057 is 750220198.

It is a cyclic number.

It is not a de Polignac number, because 891022057 - 2¹⁵ = 890989289 is a prime.

It is a super-2 number, since 2×891022057² = 1587840612121022498, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (891022007) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2029444 + ... + 2029882.

It is an arithmetic number, because the mean of its divisors is an integer number (58069440).

Almost surely, 2^891022057 is an apocalyptic number.

It is an amenable number.

891022057 is a deficient number, since it is larger than the sum of its proper divisors (38088983).

891022057 is a wasteful number, since it uses less digits than its factorization.

891022057 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 984.

The product of its (nonzero) digits is 10080, while the sum is 34.

The square root of 891022057 is about 29849.9925795636. The cubic root of 891022057 is about 962.2682392907.

The spelling of 891022057 in words is "eight hundred ninety-one million, twenty-two thousand, fifty-seven".