25231500407 has 2 divisors, whose sum is σ = 25231500408. Its totient is φ = 25231500406.

The previous prime is 25231500389. The next prime is 25231500451. The reversal of 25231500407 is 70400513252.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-25231500407 is a prime.

It is a super-2 number, since 2×25231500407² (a number of 22 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 25231500407.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (25231500467) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12615750203 + 12615750204.

It is an arithmetic number, because the mean of its divisors is an integer number (12615750204).

Almost surely, 2^25231500407 is an apocalyptic number.

25231500407 is a deficient number, since it is larger than the sum of its proper divisors (1).

25231500407 is an equidigital number, since it uses as much as digits as its factorization.

25231500407 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 8400, while the sum is 29.

The spelling of 25231500407 in words is "twenty-five billion, two hundred thirty-one million, five hundred thousand, four hundred seven".