225251431 has 4 divisors (see below), whose sum is σ = 229501512. Its totient is φ = 221001352.

The previous prime is 225251413. The next prime is 225251447. The reversal of 225251431 is 134152522.

225251431 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 225251431 - 2⁵ = 225251399 is a prime.

It is a super-2 number, since 2×225251431² = 101476414335095522, 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 = 225251396 and 225251405.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (225251471) 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, 2124961 + ... + 2125066.

It is an arithmetic number, because the mean of its divisors is an integer number (57375378).

Almost surely, 2^225251431 is an apocalyptic number.

225251431 is a deficient number, since it is larger than the sum of its proper divisors (4250081).

225251431 is an equidigital number, since it uses as much as digits as its factorization.

225251431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4250080.

The product of its digits is 2400, while the sum is 25.

The square root of 225251431 is about 15008.3786932500. The cubic root of 225251431 is about 608.4466713871.

The spelling of 225251431 in words is "two hundred twenty-five million, two hundred fifty-one thousand, four hundred thirty-one".