25051531501 has 2 divisors, whose sum is σ = 25051531502. Its totient is φ = 25051531500.

The previous prime is 25051531487. The next prime is 25051531513. The reversal of 25051531501 is 10513515052.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 24046704900 + 1004826601 = 155070^2 + 31699^2 .

It is a cyclic number.

It is not a de Polignac number, because 25051531501 - 2⁵ = 25051531469 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 25051531501.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (25051531601) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12525765750 + 12525765751.

It is an arithmetic number, because the mean of its divisors is an integer number (12525765751).

Almost surely, 2^25051531501 is an apocalyptic number.

It is an amenable number.

25051531501 is a deficient number, since it is larger than the sum of its proper divisors (1).

25051531501 is an equidigital number, since it uses as much as digits as its factorization.

25051531501 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3750, while the sum is 28.

The spelling of 25051531501 in words is "twenty-five billion, fifty-one million, five hundred thirty-one thousand, five hundred one".