225131331 has 8 divisors (see below), whose sum is σ = 309858304. Its totient is φ = 145245960.

The previous prime is 225131327. The next prime is 225131339. The reversal of 225131331 is 133131522.

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

It is not a de Polignac number, because 225131331 - 2² = 225131327 is a prime.

It is a super-2 number, since 2×225131331² = 101368232395663122, 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 = 225131298 and 225131307.

It is not an unprimeable number, because it can be changed into a prime (225131339) 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, 1210291 + ... + 1210476.

It is an arithmetic number, because the mean of its divisors is an integer number (38732288).

Almost surely, 2^225131331 is an apocalyptic number.

225131331 is a deficient number, since it is larger than the sum of its proper divisors (84726973).

225131331 is a wasteful number, since it uses less digits than its factorization.

225131331 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2420801.

The product of its digits is 540, while the sum is 21.

The square root of 225131331 is about 15004.3770613778. The cubic root of 225131331 is about 608.3385145657.

Adding to 225131331 its reverse (133131522), we get a palindrome (358262853).

The spelling of 225131331 in words is "two hundred twenty-five million, one hundred thirty-one thousand, three hundred thirty-one".