222531808725 has 18 divisors (see below), whose sum is σ = 398579195586. Its totient is φ = 118683631200.

The previous prime is 222531808699. The next prime is 222531808727. The reversal of 222531808725 is 527808135222.

It can be written as a sum of positive squares in 3 ways, for example, as 470325969 + 222061482756 = 21687^2 + 471234^2 .

It is not a de Polignac number, because 222531808725 - 2⁸ = 222531808469 is a prime.

It is a super-2 number, since 2×222531808725² (a number of 23 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (222531808727) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 494514906 + ... + 494515355.

Almost surely, 2^222531808725 is an apocalyptic number.

222531808725 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

222531808725 is a deficient number, since it is larger than the sum of its proper divisors (176047386861).

222531808725 is a wasteful number, since it uses less digits than its factorization.

222531808725 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 989030277 (or 989030269 counting only the distinct ones).

The product of its (nonzero) digits is 537600, while the sum is 45.

The spelling of 222531808725 in words is "two hundred twenty-two billion, five hundred thirty-one million, eight hundred eight thousand, seven hundred twenty-five".