225870431 has 2 divisors, whose sum is σ = 225870432. Its totient is φ = 225870430.

The previous prime is 225870427. The next prime is 225870439. The reversal of 225870431 is 134078522.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 225870431 - 2² = 225870427 is a prime.

It is a super-2 number, since 2×225870431² = 102034903200251522, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (225870439) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 112935215 + 112935216.

It is an arithmetic number, because the mean of its divisors is an integer number (112935216).

Almost surely, 2^225870431 is an apocalyptic number.

225870431 is a deficient number, since it is larger than the sum of its proper divisors (1).

225870431 is an equidigital number, since it uses as much as digits as its factorization.

225870431 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 13440, while the sum is 32.

The square root of 225870431 is about 15028.9863596984. The cubic root of 225870431 is about 609.0035069448.

The spelling of 225870431 in words is "two hundred twenty-five million, eight hundred seventy thousand, four hundred thirty-one".