25347631 has 2 divisors, whose sum is σ = 25347632. Its totient is φ = 25347630.

The previous prime is 25347613. The next prime is 25347643. The reversal of 25347631 is 13674352.

Together with previous prime (25347613) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 25347631 - 2⁵ = 25347599 is a prime.

It is a super-2 number, since 2×25347631² = 1285004794624322, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 25347593 and 25347602.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (25347661) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12673815 + 12673816.

It is an arithmetic number, because the mean of its divisors is an integer number (12673816).

Almost surely, 2^25347631 is an apocalyptic number.

25347631 is a deficient number, since it is larger than the sum of its proper divisors (1).

25347631 is an equidigital number, since it uses as much as digits as its factorization.

25347631 is an evil number, because the sum of its binary digits is even.

The product of its digits is 15120, while the sum is 31.

The square root of 25347631 is about 5034.6430856616. The cubic root of 25347631 is about 293.7508455687.

The spelling of 25347631 in words is "twenty-five million, three hundred forty-seven thousand, six hundred thirty-one".