25721048831 has 2 divisors, whose sum is σ = 25721048832. Its totient is φ = 25721048830.

The previous prime is 25721048827. The next prime is 25721048839. The reversal of 25721048831 is 13884012752.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 25721048831 - 2² = 25721048827 is a prime.

It is a super-2 number, since 2×25721048831² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (25721048839) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12860524415 + 12860524416.

It is an arithmetic number, because the mean of its divisors is an integer number (12860524416).

Almost surely, 2^25721048831 is an apocalyptic number.

25721048831 is a deficient number, since it is larger than the sum of its proper divisors (1).

25721048831 is an equidigital number, since it uses as much as digits as its factorization.

25721048831 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 107520, while the sum is 41.

The spelling of 25721048831 in words is "twenty-five billion, seven hundred twenty-one million, forty-eight thousand, eight hundred thirty-one".