225518748 has 48 divisors (see below), whose sum is σ = 647646720. Its totient is φ = 59477184.

The previous prime is 225518723. The next prime is 225518767. The reversal of 225518748 is 847815522.

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

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 102168 + ... + 104351.

It is an arithmetic number, because the mean of its divisors is an integer number (13492640).

Almost surely, 2^225518748 is an apocalyptic number.

225518748 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

225518748 is an abundant number, since it is smaller than the sum of its proper divisors (422127972).

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

225518748 is a wasteful number, since it uses less digits than its factorization.

225518748 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 206546 (or 206544 counting only the distinct ones).

The product of its digits is 179200, while the sum is 42.

The square root of 225518748 is about 15017.2816448251. The cubic root of 225518748 is about 608.6872674766.

The spelling of 225518748 in words is "two hundred twenty-five million, five hundred eighteen thousand, seven hundred forty-eight".