225121717231 has 8 divisors (see below), whose sum is σ = 230620572000. Its totient is φ = 219623247360.

The previous prime is 225121717199. The next prime is 225121717241. The reversal of 225121717231 is 132717121522.

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

It is a cyclic number.

It is not a de Polignac number, because 225121717231 - 2⁵ = 225121717199 is a prime.

It is a super-2 number, since 2×225121717231² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (225121717241) 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, 1350030 + ... + 1507588.

It is an arithmetic number, because the mean of its divisors is an integer number (28827571500).

Almost surely, 2^225121717231 is an apocalyptic number.

225121717231 is a deficient number, since it is larger than the sum of its proper divisors (5498854769).

225121717231 is a wasteful number, since it uses less digits than its factorization.

225121717231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 192449.

The product of its digits is 11760, while the sum is 34.

Adding to 225121717231 its reverse (132717121522), we get a palindrome (357838838753).

The spelling of 225121717231 in words is "two hundred twenty-five billion, one hundred twenty-one million, seven hundred seventeen thousand, two hundred thirty-one".