225116518931 has 4 divisors (see below), whose sum is σ = 227966095200. Its totient is φ = 222266942664.

The previous prime is 225116518889. The next prime is 225116518937. The reversal of 225116518931 is 139815611522.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 139815611522 = 2 ⋅69907805761.

It is a cyclic number.

It is not a de Polignac number, because 225116518931 - 2⁶ = 225116518867 is a prime.

It is a super-2 number, since 2×225116518931² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (225116518937) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1424788016 + ... + 1424788173.

It is an arithmetic number, because the mean of its divisors is an integer number (56991523800).

Almost surely, 2^225116518931 is an apocalyptic number.

225116518931 is a deficient number, since it is larger than the sum of its proper divisors (2849576269).

225116518931 is an equidigital number, since it uses as much as digits as its factorization.

225116518931 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2849576268.

The product of its digits is 129600, while the sum is 44.

The spelling of 225116518931 in words is "two hundred twenty-five billion, one hundred sixteen million, five hundred eighteen thousand, nine hundred thirty-one".