225718517 has 8 divisors (see below), whose sum is σ = 228720024. Its totient is φ = 222734848.

The previous prime is 225718501. The next prime is 225718541. The reversal of 225718517 is 715817522.

It can be written as a sum of positive squares in 4 ways, for example, as 7447441 + 218271076 = 2729^2 + 14774^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 225718517 - 2⁴ = 225718501 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (225718547) 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, 22043 + ... + 30615.

It is an arithmetic number, because the mean of its divisors is an integer number (28590003).

Almost surely, 2^225718517 is an apocalyptic number.

It is an amenable number.

225718517 is a deficient number, since it is larger than the sum of its proper divisors (3001507).

225718517 is a wasteful number, since it uses less digits than its factorization.

225718517 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8919.

The product of its digits is 39200, while the sum is 38.

The square root of 225718517 is about 15023.9314761483. The cubic root of 225718517 is about 608.8669435363.

The spelling of 225718517 in words is "two hundred twenty-five million, seven hundred eighteen thousand, five hundred seventeen".