425531047 has 2 divisors, whose sum is σ = 425531048. Its totient is φ = 425531046.

The previous prime is 425531023. The next prime is 425531077. The reversal of 425531047 is 740135524.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 425531047 - 2¹⁵ = 425498279 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (425531077) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 212765523 + 212765524.

It is an arithmetic number, because the mean of its divisors is an integer number (212765524).

Almost surely, 2^425531047 is an apocalyptic number.

425531047 is a deficient number, since it is larger than the sum of its proper divisors (1).

425531047 is an equidigital number, since it uses as much as digits as its factorization.

425531047 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 16800, while the sum is 31.

The square root of 425531047 is about 20628.4038888131. The cubic root of 425531047 is about 752.1603177653.

The spelling of 425531047 in words is "four hundred twenty-five million, five hundred thirty-one thousand, forty-seven".