225228631 has 4 divisors (see below), whose sum is σ = 238477392. Its totient is φ = 211979872.

The previous prime is 225228623. The next prime is 225228643. The reversal of 225228631 is 136822522.

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 225228631 - 2³ = 225228623 is a prime.

It is a super-2 number, since 2×225228631² = 101455872444268322, 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 = 225228593 and 225228602.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (225228611) 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, 6624355 + ... + 6624388.

It is an arithmetic number, because the mean of its divisors is an integer number (59619348).

Almost surely, 2^225228631 is an apocalyptic number.

225228631 is a deficient number, since it is larger than the sum of its proper divisors (13248761).

225228631 is a wasteful number, since it uses less digits than its factorization.

225228631 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13248760.

The product of its digits is 11520, while the sum is 31.

The square root of 225228631 is about 15007.6190983114. The cubic root of 225228631 is about 608.4261416586.

The spelling of 225228631 in words is "two hundred twenty-five million, two hundred twenty-eight thousand, six hundred thirty-one".