22712421 has 16 divisors (see below), whose sum is σ = 31334400. Its totient is φ = 14624688.

The previous prime is 22712419. The next prime is 22712441. The reversal of 22712421 is 12421722.

It is not a de Polignac number, because 22712421 - 2¹ = 22712419 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22712441) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10120 + ... + 12158.

It is an arithmetic number, because the mean of its divisors is an integer number (1958400).

Almost surely, 2^22712421 is an apocalyptic number.

It is an amenable number.

22712421 is a deficient number, since it is larger than the sum of its proper divisors (8621979).

22712421 is a wasteful number, since it uses less digits than its factorization.

22712421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2168.

The product of its digits is 448, while the sum is 21.

The square root of 22712421 is about 4765.7550293736. The cubic root of 22712421 is about 283.1964532217.

The spelling of 22712421 in words is "twenty-two million, seven hundred twelve thousand, four hundred twenty-one".