25415322501 has 4 divisors (see below), whose sum is σ = 33887096672. Its totient is φ = 16943548332.

The previous prime is 25415322463. The next prime is 25415322509. The reversal of 25415322501 is 10522351452.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 25415322501 - 2⁹ = 25415321989 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25415322509) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4235887081 + ... + 4235887086.

It is an arithmetic number, because the mean of its divisors is an integer number (8471774168).

Almost surely, 2^25415322501 is an apocalyptic number.

It is an amenable number.

25415322501 is a deficient number, since it is larger than the sum of its proper divisors (8471774171).

25415322501 is an equidigital number, since it uses as much as digits as its factorization.

25415322501 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8471774170.

The product of its (nonzero) digits is 12000, while the sum is 30.

Adding to 25415322501 its reverse (10522351452), we get a palindrome (35937673953).

The spelling of 25415322501 in words is "twenty-five billion, four hundred fifteen million, three hundred twenty-two thousand, five hundred one".