225747438 has 32 divisors (see below), whose sum is σ = 538430976. Its totient is φ = 61694688.

The previous prime is 225747419. The next prime is 225747449. The reversal of 225747438 is 834747522.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a self number, because there is not a number n which added to its sum of digits gives 225747438.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 115881 + ... + 117812.

It is an arithmetic number, because the mean of its divisors is an integer number (16825968).

Almost surely, 2^225747438 is an apocalyptic number.

225747438 is an abundant number, since it is smaller than the sum of its proper divisors (312683538).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

225747438 is a wasteful number, since it uses less digits than its factorization.

225747438 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 233728.

The product of its digits is 376320, while the sum is 42.

The square root of 225747438 is about 15024.8939430533. The cubic root of 225747438 is about 608.8929468510.

The spelling of 225747438 in words is "two hundred twenty-five million, seven hundred forty-seven thousand, four hundred thirty-eight".