22053991 has 2 divisors, whose sum is σ = 22053992. Its totient is φ = 22053990.

The previous prime is 22053979. The next prime is 22054009. The reversal of 22053991 is 19935022.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 22053991 - 2²³ = 13665383 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (22053971) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11026995 + 11026996.

It is an arithmetic number, because the mean of its divisors is an integer number (11026996).

Almost surely, 2^22053991 is an apocalyptic number.

22053991 is a deficient number, since it is larger than the sum of its proper divisors (1).

22053991 is an equidigital number, since it uses as much as digits as its factorization.

22053991 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4860, while the sum is 31.

The square root of 22053991 is about 4696.1676929173. The cubic root of 22053991 is about 280.4329653626.

The spelling of 22053991 in words is "twenty-two million, fifty-three thousand, nine hundred ninety-one".