225720879 has 8 divisors (see below), whose sum is σ = 301065600. Its totient is φ = 150428376.

The previous prime is 225720877. The next prime is 225720881. The reversal of 225720879 is 978027522.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (225720877) and next prime (225720881).

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

It is not a de Polignac number, because 225720879 - 2¹ = 225720877 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 225720879.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (225720877) 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, 1507 + ... + 21300.

It is an arithmetic number, because the mean of its divisors is an integer number (37633200).

Almost surely, 2^225720879 is an apocalyptic number.

225720879 is a deficient number, since it is larger than the sum of its proper divisors (75344721).

225720879 is a wasteful number, since it uses less digits than its factorization.

225720879 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26109.

The product of its (nonzero) digits is 141120, while the sum is 42.

The square root of 225720879 is about 15024.0100838624. The cubic root of 225720879 is about 608.8690673301.

The spelling of 225720879 in words is "two hundred twenty-five million, seven hundred twenty thousand, eight hundred seventy-nine".