225891497 has 4 divisors (see below), whose sum is σ = 243267780. Its totient is φ = 208515216.

The previous prime is 225891493. The next prime is 225891499. The reversal of 225891497 is 794198522.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 46840336 + 179051161 = 6844^2 + 13381^2 .

It is not a de Polignac number, because 225891497 - 2² = 225891493 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (225891493) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8688122 + ... + 8688147.

It is an arithmetic number, because the mean of its divisors is an integer number (60816945).

Almost surely, 2^225891497 is an apocalyptic number.

It is an amenable number.

225891497 is a deficient number, since it is larger than the sum of its proper divisors (17376283).

225891497 is a wasteful number, since it uses less digits than its factorization.

225891497 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17376282.

The product of its digits is 362880, while the sum is 47.

The square root of 225891497 is about 15029.6871890269. The cubic root of 225891497 is about 609.0224394348.

The spelling of 225891497 in words is "two hundred twenty-five million, eight hundred ninety-one thousand, four hundred ninety-seven".