2500000101 has 6 divisors (see below), whose sum is σ = 3611111270. Its totient is φ = 1666666728.

The previous prime is 2500000057. The next prime is 2500000103. The reversal of 2500000101 is 1010000052.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 2400020100 + 99980001 = 48990^2 + 9999^2 .

It is not a de Polignac number, because 2500000101 - 2¹³ = 2499991909 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (9), and also a Moran number because the ratio is a prime number: 277777789 = 2500000101 / (2 + 5 + 0 + 0 + 0 + 0 + 0 + 1 + 0 + 1).

It is a Duffinian number.

2500000101 is a modest number, since divided by 101 gives 25 as remainder.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2500000103) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 138888886 + ... + 138888903.

Almost surely, 2^2500000101 is an apocalyptic number.

It is an amenable number.

2500000101 is a deficient number, since it is larger than the sum of its proper divisors (1111111169).

2500000101 is a wasteful number, since it uses less digits than its factorization.

2500000101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 277777795 (or 277777792 counting only the distinct ones).

The product of its (nonzero) digits is 10, while the sum is 9.

The square root of 2500000101 is about 50000.0010100000. The cubic root of 2500000101 is about 1357.2088265745.

Adding to 2500000101 its reverse (1010000052), we get a palindrome (3510000153).

The spelling of 2500000101 in words is "two billion, five hundred million, one hundred one", and thus it is an aban number.