225131251 has 2 divisors, whose sum is σ = 225131252. Its totient is φ = 225131250.

The previous prime is 225131233. The next prime is 225131293. The reversal of 225131251 is 152131522.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-225131251 is a prime.

It is not a weakly prime, because it can be changed into another prime (225131201) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 112565625 + 112565626.

It is an arithmetic number, because the mean of its divisors is an integer number (112565626).

Almost surely, 2^225131251 is an apocalyptic number.

225131251 is a deficient number, since it is larger than the sum of its proper divisors (1).

225131251 is an equidigital number, since it uses as much as digits as its factorization.

225131251 is an evil number, because the sum of its binary digits is even.

The product of its digits is 600, while the sum is 22.

The square root of 225131251 is about 15004.3743954888. The cubic root of 225131251 is about 608.3384425083.

Adding to 225131251 its reverse (152131522), we get a palindrome (377262773).

The spelling of 225131251 in words is "two hundred twenty-five million, one hundred thirty-one thousand, two hundred fifty-one".