22857881 has 4 divisors (see below), whose sum is σ = 23595264. Its totient is φ = 22120500.

The previous prime is 22857871. The next prime is 22857917. The reversal of 22857881 is 18875822.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-22857881 is a prime.

It is a super-2 number, since 2×22857881² = 1044965447620322, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (22857851) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 368645 + ... + 368706.

It is an arithmetic number, because the mean of its divisors is an integer number (5898816).

Almost surely, 2^22857881 is an apocalyptic number.

It is an amenable number.

22857881 is a deficient number, since it is larger than the sum of its proper divisors (737383).

22857881 is an equidigital number, since it uses as much as digits as its factorization.

22857881 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 737382.

The product of its digits is 71680, while the sum is 41.

The square root of 22857881 is about 4780.9916335421. The cubic root of 22857881 is about 283.7997373142.

The spelling of 22857881 in words is "twenty-two million, eight hundred fifty-seven thousand, eight hundred eighty-one".