225355691 has 8 divisors (see below), whose sum is σ = 246174768. Its totient is φ = 204592000.

The previous prime is 225355667. The next prime is 225355693. The reversal of 225355691 is 196553522.

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 225355691 - 2²⁶ = 158246827 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (225355693) 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, 5090 + ... + 21831.

It is an arithmetic number, because the mean of its divisors is an integer number (30771846).

Almost surely, 2^225355691 is an apocalyptic number.

225355691 is a deficient number, since it is larger than the sum of its proper divisors (20819077).

225355691 is a wasteful number, since it uses less digits than its factorization.

225355691 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27693.

The product of its digits is 81000, while the sum is 38.

The square root of 225355691 is about 15011.8516845857. The cubic root of 225355691 is about 608.5405322263.

The spelling of 225355691 in words is "two hundred twenty-five million, three hundred fifty-five thousand, six hundred ninety-one".