22372991 has 2 divisors, whose sum is σ = 22372992. Its totient is φ = 22372990.

The previous prime is 22372981. The next prime is 22373009. The reversal of 22372991 is 19927322.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 22372991 - 2¹⁰ = 22371967 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (22372981) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11186495 + 11186496.

It is an arithmetic number, because the mean of its divisors is an integer number (11186496).

Almost surely, 2^22372991 is an apocalyptic number.

22372991 is a deficient number, since it is larger than the sum of its proper divisors (1).

22372991 is an equidigital number, since it uses as much as digits as its factorization.

22372991 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 13608, while the sum is 35.

The square root of 22372991 is about 4730.0096194405. The cubic root of 22372991 is about 281.7786058038.

The spelling of 22372991 in words is "twenty-two million, three hundred seventy-two thousand, nine hundred ninety-one".