22691457 has 6 divisors (see below), whose sum is σ = 32776562. Its totient is φ = 15127632.

The previous prime is 22691443. The next prime is 22691467. The reversal of 22691457 is 75419622.

It can be written as a sum of positive squares in only one way, i.e., 22667121 + 24336 = 4761^2 + 156^2 .

It is not a de Polignac number, because 22691457 - 2⁴ = 22691441 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (22691437) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1260628 + ... + 1260645.

Almost surely, 2^22691457 is an apocalyptic number.

It is an amenable number.

22691457 is a deficient number, since it is larger than the sum of its proper divisors (10085105).

22691457 is a wasteful number, since it uses less digits than its factorization.

22691457 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2521279 (or 2521276 counting only the distinct ones).

The product of its digits is 30240, while the sum is 36.

The square root of 22691457 is about 4763.5550799797. Note that the first 3 decimals coincide. The cubic root of 22691457 is about 283.1092944813.

The spelling of 22691457 in words is "twenty-two million, six hundred ninety-one thousand, four hundred fifty-seven".