22463991 has 24 divisors (see below), whose sum is σ = 35757696. Its totient is φ = 13476240.

The previous prime is 22463981. The next prime is 22463993. The reversal of 22463991 is 19936422.

It is not a de Polignac number, because 22463991 - 2⁶ = 22463927 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22463993) 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, 9096 + ... + 11298.

It is an arithmetic number, because the mean of its divisors is an integer number (1489904).

Almost surely, 2^22463991 is an apocalyptic number.

22463991 is a deficient number, since it is larger than the sum of its proper divisors (13293705).

22463991 is a wasteful number, since it uses less digits than its factorization.

22463991 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2323 (or 2320 counting only the distinct ones).

The product of its digits is 23328, while the sum is 36.

The square root of 22463991 is about 4739.6192885083. The cubic root of 22463991 is about 282.1601248448.

The spelling of 22463991 in words is "twenty-two million, four hundred sixty-three thousand, nine hundred ninety-one".