225730720031 has 4 divisors (see below), whose sum is σ = 225765848712. Its totient is φ = 225695591352.

The previous prime is 225730720021. The next prime is 225730720043. The reversal of 225730720031 is 130027037522.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 225730720031 - 2¹⁴ = 225730703647 is a prime.

It is a super-2 number, since 2×225730720031² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 225730720031.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (225730720001) 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, 17554700 + ... + 17567553.

It is an arithmetic number, because the mean of its divisors is an integer number (56441462178).

Almost surely, 2^225730720031 is an apocalyptic number.

225730720031 is a deficient number, since it is larger than the sum of its proper divisors (35128681).

225730720031 is an equidigital number, since it uses as much as digits as its factorization.

225730720031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35128680.

The product of its (nonzero) digits is 17640, while the sum is 32.

Adding to 225730720031 its reverse (130027037522), we get a palindrome (355757757553).

The spelling of 225730720031 in words is "two hundred twenty-five billion, seven hundred thirty million, seven hundred twenty thousand, thirty-one".