22613881 has 8 divisors (see below), whose sum is σ = 23836680. Its totient is φ = 21420672.

The previous prime is 22613873. The next prime is 22613887. The reversal of 22613881 is 18831622.

It can be written as a sum of positive squares in 4 ways, for example, as 8173881 + 14440000 = 2859^2 + 3800^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 22613881 - 2³ = 22613873 is a prime.

It is a super-2 number, since 2×22613881² = 1022775227764322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (22613887) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5820 + ... + 8893.

It is an arithmetic number, because the mean of its divisors is an integer number (2979585).

Almost surely, 2^22613881 is an apocalyptic number.

It is an amenable number.

22613881 is a deficient number, since it is larger than the sum of its proper divisors (1222799).

22613881 is a wasteful number, since it uses less digits than its factorization.

22613881 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14795.

The product of its digits is 4608, while the sum is 31.

The square root of 22613881 is about 4755.4054506425. The cubic root of 22613881 is about 282.7863012330.

The spelling of 22613881 in words is "twenty-two million, six hundred thirteen thousand, eight hundred eighty-one".