22655247381 has 12 divisors (see below), whose sum is σ = 35241496108. Its totient is φ = 13941690624.

The previous prime is 22655247367. The next prime is 22655247389. The reversal of 22655247381 is 18374255622.

22655247381 is a `hidden beast` number, since 2 + 26 + 5 + 5 + 247 + 381 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 3876930225 + 18778317156 = 62265^2 + 137034^2 .

It is not a de Polignac number, because 22655247381 - 2¹⁸ = 22654985237 is a prime.

It is a super-2 number, since 2×22655247381² (a number of 22 digits) contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22655247389) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 96817180 + ... + 96817413.

Almost surely, 2^22655247381 is an apocalyptic number.

It is an amenable number.

22655247381 is a deficient number, since it is larger than the sum of its proper divisors (12586248727).

22655247381 is a wasteful number, since it uses less digits than its factorization.

22655247381 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 193634612 (or 193634609 counting only the distinct ones).

The product of its digits is 806400, while the sum is 45.

The spelling of 22655247381 in words is "twenty-two billion, six hundred fifty-five million, two hundred forty-seven thousand, three hundred eighty-one".