222512252661 has 16 divisors (see below), whose sum is σ = 329726121600. Its totient is φ = 148306248864.

The previous prime is 222512252659. The next prime is 222512252681. The reversal of 222512252661 is 166252215222.

222512252661 is a `hidden beast` number, since 2 + 2 + 2 + 5 + 122 + 526 + 6 + 1 = 666.

It is not a de Polignac number, because 222512252661 - 2¹ = 222512252659 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (222512252681) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 863281 + ... + 1090998.

It is an arithmetic number, because the mean of its divisors is an integer number (20607882600).

Almost surely, 2^222512252661 is an apocalyptic number.

It is an amenable number.

222512252661 is a deficient number, since it is larger than the sum of its proper divisors (107213868939).

222512252661 is a wasteful number, since it uses less digits than its factorization.

222512252661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1958505 (or 1958499 counting only the distinct ones).

The product of its digits is 57600, while the sum is 36.

Adding to 222512252661 its reverse (166252215222), we get a palindrome (388764467883).

The spelling of 222512252661 in words is "two hundred twenty-two billion, five hundred twelve million, two hundred fifty-two thousand, six hundred sixty-one".