22501432981 has 2 divisors, whose sum is σ = 22501432982. Its totient is φ = 22501432980.

The previous prime is 22501432939. The next prime is 22501433023. The reversal of 22501432981 is 18923410522.

It is a balanced prime because it is at equal distance from previous prime (22501432939) and next prime (22501433023).

It can be written as a sum of positive squares in only one way, i.e., 20372994756 + 2128438225 = 142734^2 + 46135^2 .

It is a cyclic number.

It is not a de Polignac number, because 22501432981 - 2¹⁹ = 22500908693 is a prime.

It is a super-2 number, since 2×22501432981² (a number of 22 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 22501432981.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (22501432901) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11250716490 + 11250716491.

It is an arithmetic number, because the mean of its divisors is an integer number (11250716491).

Almost surely, 2^22501432981 is an apocalyptic number.

It is an amenable number.

22501432981 is a deficient number, since it is larger than the sum of its proper divisors (1).

22501432981 is an equidigital number, since it uses as much as digits as its factorization.

22501432981 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 34560, while the sum is 37.

The spelling of 22501432981 in words is "twenty-two billion, five hundred one million, four hundred thirty-two thousand, nine hundred eighty-one".