22901071561 has 9 divisors (see below), whose sum is σ = 23479619079. Its totient is φ = 22336455600.

The previous prime is 22901071559. The next prime is 22901071591. The reversal of 22901071561 is 16517010922.

The square root of 22901071561 is 151331.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 1103501961 + 21797569600 = 33219^2 + 147640^2 .

It is not a de Polignac number, because 22901071561 - 2¹ = 22901071559 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (22901071511) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 6202726 + ... + 6206416.

Almost surely, 2^22901071561 is an apocalyptic number.

22901071561 is the 151331-st square number.

22901071561 is the 75666-th centered octagonal number.

It is an amenable number.

22901071561 is a deficient number, since it is larger than the sum of its proper divisors (578547518).

22901071561 is an frugal number, since it uses more digits than its factorization.

22901071561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7464 (or 3732 counting only the distinct ones).

The product of its (nonzero) digits is 7560, while the sum is 34.

The spelling of 22901071561 in words is "twenty-two billion, nine hundred one million, seventy-one thousand, five hundred sixty-one".