225936817437 has 4 divisors (see below), whose sum is σ = 301249089920. Its totient is φ = 150624544956.

The previous prime is 225936817429. The next prime is 225936817439. The reversal of 225936817437 is 734718639522.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 225936817437 - 2³ = 225936817429 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 (225936817439) 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, 37656136237 + ... + 37656136242.

It is an arithmetic number, because the mean of its divisors is an integer number (75312272480).

Almost surely, 2^225936817437 is an apocalyptic number.

It is an amenable number.

225936817437 is a deficient number, since it is larger than the sum of its proper divisors (75312272483).

225936817437 is an equidigital number, since it uses as much as digits as its factorization.

225936817437 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 75312272482.

The product of its digits is 15240960, while the sum is 57.

The spelling of 225936817437 in words is "two hundred twenty-five billion, nine hundred thirty-six million, eight hundred seventeen thousand, four hundred thirty-seven".