25431244001 has 4 divisors (see below), whose sum is σ = 25431737604. Its totient is φ = 25430750400.

The previous prime is 25431243991. The next prime is 25431244009. The reversal of 25431244001 is 10044213452.

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 15164691025 + 10266552976 = 123145^2 + 101324^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-25431244001 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (25431244009) 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, 159140 + ... + 276021.

It is an arithmetic number, because the mean of its divisors is an integer number (6357934401).

Almost surely, 2^25431244001 is an apocalyptic number.

It is an amenable number.

25431244001 is a deficient number, since it is larger than the sum of its proper divisors (493603).

25431244001 is an equidigital number, since it uses as much as digits as its factorization.

25431244001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 493602.

The product of its (nonzero) digits is 3840, while the sum is 26.

Adding to 25431244001 its reverse (10044213452), we get a palindrome (35475457453).

The spelling of 25431244001 in words is "twenty-five billion, four hundred thirty-one million, two hundred forty-four thousand, one".