25002001501 has 4 divisors (see below), whose sum is σ = 25004823712. Its totient is φ = 24999179292.

The previous prime is 25002001499. The next prime is 25002001511. The reversal of 25002001501 is 10510020052.

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 a cyclic number.

It is not a de Polignac number, because 25002001501 - 2¹ = 25002001499 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 (25002001511) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1397775 + ... + 1415548.

It is an arithmetic number, because the mean of its divisors is an integer number (6251205928).

Almost surely, 2^25002001501 is an apocalyptic number.

It is an amenable number.

25002001501 is a deficient number, since it is larger than the sum of its proper divisors (2822211).

25002001501 is an equidigital number, since it uses as much as digits as its factorization.

25002001501 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2822210.

The product of its (nonzero) digits is 100, while the sum is 16.

Adding to 25002001501 its reverse (10510020052), we get a palindrome (35512021553).

The spelling of 25002001501 in words is "twenty-five billion, two million, one thousand, five hundred one".