224157 has 4 divisors (see below), whose sum is σ = 298880. Its totient is φ = 149436.

The previous prime is 224153. The next prime is 224171. The reversal of 224157 is 751422.

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 224157 - 2² = 224153 is a prime.

It is a D-number.

It is a Duffinian number.

224157 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (224153) 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, 37357 + ... + 37362.

It is an arithmetic number, because the mean of its divisors is an integer number (74720).

2²²⁴¹⁵⁷ is an apocalyptic number.

It is an amenable number.

224157 is a deficient number, since it is larger than the sum of its proper divisors (74723).

224157 is an equidigital number, since it uses as much as digits as its factorization.

224157 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 74722.

The product of its digits is 560, while the sum is 21.

The square root of 224157 is about 473.4522151179. The cubic root of 224157 is about 60.7459649473.

Adding to 224157 its reverse (751422), we get a palindrome (975579).

It can be divided in two parts, 22415 and 7, that added together give a palindrome (22422).

The spelling of 224157 in words is "two hundred twenty-four thousand, one hundred fifty-seven".