225747428 has 6 divisors (see below), whose sum is σ = 395058006. Its totient is φ = 112873712.

The previous prime is 225747419. The next prime is 225747449. The reversal of 225747428 is 824747522.

225747428 is digitally balanced in base 2 and base 3, because in such bases it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 221176384 + 4571044 = 14872^2 + 2138^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28218425 + ... + 28218432.

It is an arithmetic number, because the mean of its divisors is an integer number (65843001).

Almost surely, 2^225747428 is an apocalyptic number.

It is an amenable number.

225747428 is a deficient number, since it is larger than the sum of its proper divisors (169310578).

225747428 is a wasteful number, since it uses less digits than its factorization.

225747428 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 56436861 (or 56436859 counting only the distinct ones).

The product of its digits is 250880, while the sum is 41.

The square root of 225747428 is about 15024.8936102723. The cubic root of 225747428 is about 608.8929378602.

The spelling of 225747428 in words is "two hundred twenty-five million, seven hundred forty-seven thousand, four hundred twenty-eight".