22981951 has 4 divisors (see below), whose sum is σ = 22995000. Its totient is φ = 22968904.

The previous prime is 22981939. The next prime is 22981957. The reversal of 22981951 is 15918922.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-22981951 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 22981951.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22981957) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3376 + ... + 7573.

It is an arithmetic number, because the mean of its divisors is an integer number (5748750).

Almost surely, 2^22981951 is an apocalyptic number.

22981951 is a deficient number, since it is larger than the sum of its proper divisors (13049).

22981951 is a wasteful number, since it uses less digits than its factorization.

22981951 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13048.

The product of its digits is 12960, while the sum is 37.

The square root of 22981951 is about 4793.9494156697. The cubic root of 22981951 is about 284.3122887278.

It can be divided in two parts, 22981 and 951, that added together give a palindrome (23932).

The spelling of 22981951 in words is "twenty-two million, nine hundred eighty-one thousand, nine hundred fifty-one".