22001132997 has 6 divisors (see below), whose sum is σ = 31779414342. Its totient is φ = 14667421992.

The previous prime is 22001132929. The next prime is 22001133017. The reversal of 22001132997 is 79923110022.

It can be written as a sum of positive squares in only one way, i.e., 18868044321 + 3133088676 = 137361^2 + 55974^2 .

It is not a de Polignac number, because 22001132997 - 2¹⁰ = 22001131973 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22001132927) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1222285158 + ... + 1222285175.

It is an arithmetic number, because the mean of its divisors is an integer number (5296569057).

Almost surely, 2^22001132997 is an apocalyptic number.

It is an amenable number.

22001132997 is a deficient number, since it is larger than the sum of its proper divisors (9778281345).

22001132997 is a wasteful number, since it uses less digits than its factorization.

22001132997 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2444570339 (or 2444570336 counting only the distinct ones).

The product of its (nonzero) digits is 13608, while the sum is 36.

The spelling of 22001132997 in words is "twenty-two billion, one million, one hundred thirty-two thousand, nine hundred ninety-seven".