22864381 has 4 divisors (see below), whose sum is σ = 23010172. Its totient is φ = 22718592.

The previous prime is 22864357. The next prime is 22864399. The reversal of 22864381 is 18346822.

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

It can be written as a sum of positive squares in 2 ways, for example, as 3767481 + 19096900 = 1941^2 + 4370^2 .

It is a cyclic number.

It is not a de Polignac number, because 22864381 - 2⁵ = 22864349 is a prime.

It is a super-2 number, since 2×22864381² = 1045559837026322, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22864181) 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, 72660 + ... + 72973.

It is an arithmetic number, because the mean of its divisors is an integer number (5752543).

Almost surely, 2^22864381 is an apocalyptic number.

It is an amenable number.

22864381 is a deficient number, since it is larger than the sum of its proper divisors (145791).

22864381 is a wasteful number, since it uses less digits than its factorization.

22864381 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 145790.

The product of its digits is 18432, while the sum is 34.

The square root of 22864381 is about 4781.6713605182. The cubic root of 22864381 is about 283.8266357461.

The spelling of 22864381 in words is "twenty-two million, eight hundred sixty-four thousand, three hundred eighty-one".