22691961 has 16 divisors (see below), whose sum is σ = 35080320. Its totient is φ = 14469840.

The previous prime is 22691959. The next prime is 22691993. The reversal of 22691961 is 16919622.

It is not a de Polignac number, because 22691961 - 2¹ = 22691959 is a prime.

It is not an unprimeable number, because it can be changed into a prime (22691941) 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, 17650 + ... + 18891.

It is an arithmetic number, because the mean of its divisors is an integer number (2192520).

Almost surely, 2^22691961 is an apocalyptic number.

It is an amenable number.

22691961 is a deficient number, since it is larger than the sum of its proper divisors (12388359).

22691961 is a wasteful number, since it uses less digits than its factorization.

22691961 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36573 (or 36567 counting only the distinct ones).

The product of its digits is 11664, while the sum is 36.

The square root of 22691961 is about 4763.6079813519. The cubic root of 22691961 is about 283.1113905129. Note that the first 3 decimals are identical.

The spelling of 22691961 in words is "twenty-two million, six hundred ninety-one thousand, nine hundred sixty-one".