225711661231 has 8 divisors (see below), whose sum is σ = 273130077600. Its totient is φ = 182086718208.

The previous prime is 225711661211. The next prime is 225711661267. The reversal of 225711661231 is 132166117522.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 225711661231 - 2¹⁹ = 225711136943 is a prime.

It is a super-2 number, since 2×225711661231² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (225711661211) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 948368206 + ... + 948368443.

It is an arithmetic number, because the mean of its divisors is an integer number (34141259700).

Almost surely, 2^225711661231 is an apocalyptic number.

225711661231 is a deficient number, since it is larger than the sum of its proper divisors (47418416369).

225711661231 is a wasteful number, since it uses less digits than its factorization.

225711661231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1896736673.

The product of its digits is 30240, while the sum is 37.

Adding to 225711661231 its reverse (132166117522), we get a palindrome (357877778753).

The spelling of 225711661231 in words is "two hundred twenty-five billion, seven hundred eleven million, six hundred sixty-one thousand, two hundred thirty-one".