225128783 has 8 divisors (see below), whose sum is σ = 245796816. Its totient is φ = 204494400.

The previous prime is 225128747. The next prime is 225128791. The reversal of 225128783 is 387821522.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 225128783 - 2¹⁸ = 224866639 is a prime.

It is a super-2 number, since 2×225128783² = 101365937870122178, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (225128713) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6785 + ... + 22277.

It is an arithmetic number, because the mean of its divisors is an integer number (30724602).

Almost surely, 2^225128783 is an apocalyptic number.

225128783 is a deficient number, since it is larger than the sum of its proper divisors (20668033).

225128783 is a wasteful number, since it uses less digits than its factorization.

225128783 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16825.

The product of its digits is 53760, while the sum is 38.

The square root of 225128783 is about 15004.2921525809. The cubic root of 225128783 is about 608.3362195314.

The spelling of 225128783 in words is "two hundred twenty-five million, one hundred twenty-eight thousand, seven hundred eighty-three".