225931 has 2 divisors, whose sum is σ = 225932. Its totient is φ = 225930.

The previous prime is 225919. The next prime is 225941. The reversal of 225931 is 139522.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 225931 - 2¹³ = 217739 is a prime.

It is a super-2 number, since 2×225931² = 102089633522, which contains 22 as substring.

225931 is a lucky number.

It is not a weakly prime, because it can be changed into another prime (225941) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 112965 + 112966.

It is an arithmetic number, because the mean of its divisors is an integer number (112966).

2²²⁵⁹³¹ is an apocalyptic number.

225931 is a deficient number, since it is larger than the sum of its proper divisors (1).

225931 is an equidigital number, since it uses as much as digits as its factorization.

225931 is an evil number, because the sum of its binary digits is even.

The product of its digits is 540, while the sum is 22.

The square root of 225931 is about 475.3219961247. The cubic root of 225931 is about 60.9057938500.

It can be divided in two parts, 225 and 931, that added together give a square (1156 = 34²).

The spelling of 225931 in words is "two hundred twenty-five thousand, nine hundred thirty-one".