22002501491 has 2 divisors, whose sum is σ = 22002501492. Its totient is φ = 22002501490.

The previous prime is 22002501487. The next prime is 22002501553. The reversal of 22002501491 is 19410520022.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 22002501491 - 2² = 22002501487 is a prime.

It is a super-2 number, since 2×22002501491² (a number of 21 digits) contains 22 as substring.

It is a Sophie Germain prime.

It is a self number, because there is not a number n which added to its sum of digits gives 22002501491.

It is not a weakly prime, because it can be changed into another prime (22002501421) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11001250745 + 11001250746.

It is an arithmetic number, because the mean of its divisors is an integer number (11001250746).

Almost surely, 2^22002501491 is an apocalyptic number.

22002501491 is a deficient number, since it is larger than the sum of its proper divisors (1).

22002501491 is an equidigital number, since it uses as much as digits as its factorization.

22002501491 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1440, while the sum is 26.

The spelling of 22002501491 in words is "twenty-two billion, two million, five hundred one thousand, four hundred ninety-one".