22307913 has 16 divisors (see below), whose sum is σ = 33125760. Its totient is φ = 14837328.

The previous prime is 22307903. The next prime is 22307917. The reversal of 22307913 is 31970322.

It is not a de Polignac number, because 22307913 - 2⁴ = 22307897 is a prime.

It is a super-3 number, since 3×22307913³ (a number of 23 digits) contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (22307917) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 16831 + ... + 18107.

It is an arithmetic number, because the mean of its divisors is an integer number (2070360).

Almost surely, 2^22307913 is an apocalyptic number.

It is an amenable number.

22307913 is a deficient number, since it is larger than the sum of its proper divisors (10817847).

22307913 is a wasteful number, since it uses less digits than its factorization.

22307913 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1933 (or 1927 counting only the distinct ones).

The product of its (nonzero) digits is 2268, while the sum is 27.

The square root of 22307913 is about 4723.1253423978. The cubic root of 22307913 is about 281.5051302715.

It can be divided in two parts, 22307 and 913, that added together give a triangular number (23220 = T₂₁₅).

The spelling of 22307913 in words is "twenty-two million, three hundred seven thousand, nine hundred thirteen".