225927391 has 4 divisors (see below), whose sum is σ = 225983800. Its totient is φ = 225870984.

The previous prime is 225927379. The next prime is 225927409. The reversal of 225927391 is 193729522.

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

It is a de Polignac number, because none of the positive numbers 2^k-225927391 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 (225927311) 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, 21696 + ... + 30373.

It is an arithmetic number, because the mean of its divisors is an integer number (56495950).

Almost surely, 2^225927391 is an apocalyptic number.

225927391 is a deficient number, since it is larger than the sum of its proper divisors (56409).

225927391 is an equidigital number, since it uses as much as digits as its factorization.

225927391 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 56408.

The product of its digits is 68040, while the sum is 40.

The square root of 225927391 is about 15030.8812449570. The cubic root of 225927391 is about 609.0546954721.

The spelling of 225927391 in words is "two hundred twenty-five million, nine hundred twenty-seven thousand, three hundred ninety-one".