25140251201 has 4 divisors (see below), whose sum is σ = 27074116692. Its totient is φ = 23206385712.

The previous prime is 25140251197. The next prime is 25140251203. The reversal of 25140251201 is 10215204152.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 6272481601 + 18867769600 = 79199^2 + 137360^2 .

It is a cyclic number.

It is not a de Polignac number, because 25140251201 - 2² = 25140251197 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (25140251203) 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, 966932726 + ... + 966932751.

It is an arithmetic number, because the mean of its divisors is an integer number (6768529173).

Almost surely, 2^25140251201 is an apocalyptic number.

It is an amenable number.

25140251201 is a deficient number, since it is larger than the sum of its proper divisors (1933865491).

25140251201 is a wasteful number, since it uses less digits than its factorization.

25140251201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1933865490.

The product of its (nonzero) digits is 800, while the sum is 23.

Adding to 25140251201 its reverse (10215204152), we get a palindrome (35355455353).

The spelling of 25140251201 in words is "twenty-five billion, one hundred forty million, two hundred fifty-one thousand, two hundred one".