2500172001 has 10 divisors (see below), whose sum is σ = 3734824962. Its totient is φ = 1666781280.

The previous prime is 2500171991. The next prime is 2500172009. The reversal of 2500172001 is 1002710052.

It can be written as a sum of positive squares in only one way, i.e., 1995944976 + 504227025 = 44676^2 + 22455^2 .

It is not a de Polignac number, because 2500172001 - 2⁵ = 2500171969 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2500172009) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 15433080 + ... + 15433241.

Almost surely, 2^2500172001 is an apocalyptic number.

It is an amenable number.

2500172001 is a deficient number, since it is larger than the sum of its proper divisors (1234652961).

2500172001 is an equidigital number, since it uses as much as digits as its factorization.

2500172001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30866333 (or 30866324 counting only the distinct ones).

The product of its (nonzero) digits is 140, while the sum is 18.

The square root of 2500172001 is about 50001.7199804167. The cubic root of 2500172001 is about 1357.2399330866.

Adding to 2500172001 its reverse (1002710052), we get a palindrome (3502882053).

The spelling of 2500172001 in words is "two billion, five hundred million, one hundred seventy-two thousand, one".