225723440031 has 4 divisors (see below), whose sum is σ = 300964586712. Its totient is φ = 150482293352.

The previous prime is 225723439943. The next prime is 225723440093. The reversal of 225723440031 is 130044327522.

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 225723440031 - 2¹⁷ = 225723308959 is a prime.

It is a super-2 number, since 2×225723440031² (a number of 24 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 225723439974 and 225723440001.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (225723440731) 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, 37620573336 + ... + 37620573341.

It is an arithmetic number, because the mean of its divisors is an integer number (75241146678).

Almost surely, 2^225723440031 is an apocalyptic number.

225723440031 is a deficient number, since it is larger than the sum of its proper divisors (75241146681).

225723440031 is an equidigital number, since it uses as much as digits as its factorization.

225723440031 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 75241146680.

The product of its (nonzero) digits is 40320, while the sum is 33.

Adding to 225723440031 its reverse (130044327522), we get a palindrome (355767767553).

The spelling of 225723440031 in words is "two hundred twenty-five billion, seven hundred twenty-three million, four hundred forty thousand, thirty-one".