225718545 has 16 divisors (see below), whose sum is σ = 388930752. Its totient is φ = 111122880.

The previous prime is 225718541. The next prime is 225718547. The reversal of 225718545 is 545817522.

It is not a de Polignac number, because 225718545 - 2² = 225718541 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a nialpdrome in base 16.

It is not an unprimeable number, because it can be changed into a prime (225718541) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 578571 + ... + 578960.

It is an arithmetic number, because the mean of its divisors is an integer number (24308172).

Almost surely, 2^225718545 is an apocalyptic number.

It is an amenable number.

225718545 is a deficient number, since it is larger than the sum of its proper divisors (163212207).

225718545 is a wasteful number, since it uses less digits than its factorization.

225718545 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1157552.

The product of its digits is 112000, while the sum is 39.

The square root of 225718545 is about 15023.9324079949. The cubic root of 225718545 is about 608.8669687126.

It can be divided in two parts, 2257 and 18545, that added together give a palindrome (20802).

The spelling of 225718545 in words is "two hundred twenty-five million, seven hundred eighteen thousand, five hundred forty-five".