22601591 has 2 divisors, whose sum is σ = 22601592. Its totient is φ = 22601590.

The previous prime is 22601587. The next prime is 22601597. The reversal of 22601591 is 19510622.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 22601591 - 2² = 22601587 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 22601591.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (22601597) 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 as a sum of consecutive naturals, namely, 11300795 + 11300796.

It is an arithmetic number, because the mean of its divisors is an integer number (11300796).

Almost surely, 2^22601591 is an apocalyptic number.

22601591 is a deficient number, since it is larger than the sum of its proper divisors (1).

22601591 is an equidigital number, since it uses as much as digits as its factorization.

22601591 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1080, while the sum is 26.

The square root of 22601591 is about 4754.1130613396. The cubic root of 22601591 is about 282.7350631839.

The spelling of 22601591 in words is "twenty-two million, six hundred one thousand, five hundred ninety-one".