225658291 has 2 divisors, whose sum is σ = 225658292. Its totient is φ = 225658290.

The previous prime is 225658283. The next prime is 225658333. The reversal of 225658291 is 192856522.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 225658291 - 2³ = 225658283 is a prime.

It is not a weakly prime, because it can be changed into another prime (225658261) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 112829145 + 112829146.

It is an arithmetic number, because the mean of its divisors is an integer number (112829146).

Almost surely, 2^225658291 is an apocalyptic number.

225658291 is a deficient number, since it is larger than the sum of its proper divisors (1).

225658291 is an equidigital number, since it uses as much as digits as its factorization.

225658291 is an evil number, because the sum of its binary digits is even.

The product of its digits is 86400, while the sum is 40.

The square root of 225658291 is about 15021.9270068790. The cubic root of 225658291 is about 608.8127862864.

The spelling of 225658291 in words is "two hundred twenty-five million, six hundred fifty-eight thousand, two hundred ninety-one".