25210000001 has 4 divisors (see below), whose sum is σ = 25250727600. Its totient is φ = 25169272404.

The previous prime is 25209999977. The next prime is 25210000021. The reversal of 25210000001 is 10000001252.

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 a de Polignac number, because none of the positive numbers 2^k-25210000001 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (25210000021) 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, 20362871 + ... + 20364108.

It is an arithmetic number, because the mean of its divisors is an integer number (6312681900).

Almost surely, 2^25210000001 is an apocalyptic number.

It is an amenable number.

25210000001 is a deficient number, since it is larger than the sum of its proper divisors (40727599).

25210000001 is an equidigital number, since it uses as much as digits as its factorization.

25210000001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40727598.

The product of its (nonzero) digits is 20, while the sum is 11.

Adding to 25210000001 its reverse (10000001252), we get a palindrome (35210001253).

It can be divided in two parts, 252 and 10000001, that multiplied together give a palindrome (2520000252).

The spelling of 25210000001 in words is "twenty-five billion, two hundred ten million, one", and thus it is an aban number.