225129786 has 16 divisors (see below), whose sum is σ = 514582464. Its totient is φ = 64322784.

The previous prime is 225129763. The next prime is 225129797. The reversal of 225129786 is 687921522.

It is a Harshad number since it is a multiple of its sum of digits (42), and also a Moran number because the ratio is a prime number: 5360233 = 225129786 / (2 + 2 + 5 + 1 + 2 + 9 + 7 + 8 + 6).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2680075 + ... + 2680158.

It is an arithmetic number, because the mean of its divisors is an integer number (32161404).

Almost surely, 2^225129786 is an apocalyptic number.

225129786 is an abundant number, since it is smaller than the sum of its proper divisors (289452678).

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

225129786 is a wasteful number, since it uses less digits than its factorization.

225129786 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5360245.

The product of its digits is 120960, while the sum is 42.

The square root of 225129786 is about 15004.3255763130. The cubic root of 225129786 is about 608.3371229555.

The spelling of 225129786 in words is "two hundred twenty-five million, one hundred twenty-nine thousand, seven hundred eighty-six".