225511031 has 8 divisors (see below), whose sum is σ = 226646784. Its totient is φ = 224379000.

The previous prime is 225511009. The next prime is 225511037. The reversal of 225511031 is 130115522.

It is a happy number.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-225511031 is a prime.

It is a super-2 number, since 2×225511031² = 101710450205365922, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 225510994 and 225511012.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (225511037) 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, 299906 + ... + 300656.

It is an arithmetic number, because the mean of its divisors is an integer number (28330848).

Almost surely, 2^225511031 is an apocalyptic number.

225511031 is a deficient number, since it is larger than the sum of its proper divisors (1135753).

225511031 is an equidigital number, since it uses as much as digits as its factorization.

225511031 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1861.

The product of its (nonzero) digits is 300, while the sum is 20.

The square root of 225511031 is about 15017.0247053136. The cubic root of 225511031 is about 608.6803245310.

Adding to 225511031 its reverse (130115522), we get a palindrome (355626553).

The spelling of 225511031 in words is "two hundred twenty-five million, five hundred eleven thousand, thirty-one".