1625448431 has 2 divisors, whose sum is σ = 1625448432. Its totient is φ = 1625448430.

The previous prime is 1625448413. The next prime is 1625448457. The reversal of 1625448431 is 1348445261.

It is a happy number.

Together with previous prime (1625448413) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It is an emirp because it is prime and its reverse (1348445261) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1625448431 - 2⁶ = 1625448367 is a prime.

It is a super-2 number, since 2×1625448431² = 5284165203680723522, which contains 22 as substring.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1625448401) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 812724215 + 812724216.

It is an arithmetic number, because the mean of its divisors is an integer number (812724216).

Almost surely, 2^1625448431 is an apocalyptic number.

1625448431 is a deficient number, since it is larger than the sum of its proper divisors (1).

1625448431 is an equidigital number, since it uses as much as digits as its factorization.

1625448431 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 92160, while the sum is 38.

The square root of 1625448431 is about 40316.8504598263. The cubic root of 1625448431 is about 1175.7754786695.

The spelling of 1625448431 in words is "one billion, six hundred twenty-five million, four hundred forty-eight thousand, four hundred thirty-one".