22139857500601 has 3 divisors (see below), whose sum is σ = 22139862205903. Its totient is φ = 22139852795300.

The previous prime is 22139857500599. The next prime is 22139857500611. The reversal of 22139857500601 is 10600575893122.

The square root of 22139857500601 is 4705301.

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

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in only one way, i.e., 12278373410601 + 9861484090000 = 3504051^2 + 3140300^2 .

It is not a de Polignac number, because 22139857500601 - 2¹ = 22139857500599 is a prime.

It is a super-2 number, since 2×22139857500601² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (22139857500611) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 2352651 + ... + 7057951.

Almost surely, 2^{22139857500601} is an apocalyptic number.

22139857500601 is the 4705301-st square number.

22139857500601 is the 2352651-st centered octagonal number.

It is an amenable number.

22139857500601 is a deficient number, since it is larger than the sum of its proper divisors (4705302).

22139857500601 is an frugal number, since it uses more digits than its factorization.

22139857500601 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9410602 (or 4705301 counting only the distinct ones).

The product of its (nonzero) digits is 907200, while the sum is 49.

The spelling of 22139857500601 in words is "twenty-two trillion, one hundred thirty-nine billion, eight hundred fifty-seven million, five hundred thousand, six hundred one".