22280931 has 24 divisors (see below), whose sum is σ = 34420464. Its totient is φ = 13839360.

The previous prime is 22280927. The next prime is 22280933. The reversal of 22280931 is 13908222.

It is a happy number.

It is not a de Polignac number, because 22280931 - 2² = 22280927 is a prime.

It is a super-2 number, since 2×22280931² = 992879772453522, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 22280895 and 22280904.

It is not an unprimeable number, because it can be changed into a prime (22280933) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 15691 + ... + 17051.

It is an arithmetic number, because the mean of its divisors is an integer number (1434186).

Almost surely, 2^22280931 is an apocalyptic number.

22280931 is a deficient number, since it is larger than the sum of its proper divisors (12139533).

22280931 is a wasteful number, since it uses less digits than its factorization.

22280931 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1491 (or 1488 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 27.

The square root of 22280931 is about 4720.2681067922. The cubic root of 22280931 is about 281.3915885605.

The spelling of 22280931 in words is "twenty-two million, two hundred eighty thousand, nine hundred thirty-one".