25431022402201 has 4 divisors (see below), whose sum is σ = 27387254894692. Its totient is φ = 23474789909712.

The previous prime is 25431022402171. The next prime is 25431022402223. The reversal of 25431022402201 is 10220422013452.

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 2558477026576 + 22872545375625 = 1599524^2 + 4782525^2 .

It is a cyclic number.

It is not a de Polignac number, because 25431022402201 - 2⁵ = 25431022402169 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 25431022402201.

It is not an unprimeable number, because it can be changed into a prime (25431022402601) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 978116246226 + ... + 978116246251.

It is an arithmetic number, because the mean of its divisors is an integer number (6846813723673).

Almost surely, 2^{25431022402201} is an apocalyptic number.

It is an amenable number.

25431022402201 is a deficient number, since it is larger than the sum of its proper divisors (1956232492491).

25431022402201 is a wasteful number, since it uses less digits than its factorization.

25431022402201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1956232492490.

The product of its (nonzero) digits is 7680, while the sum is 28.

Adding to 25431022402201 its reverse (10220422013452), we get a palindrome (35651444415653).

The spelling of 25431022402201 in words is "twenty-five trillion, four hundred thirty-one billion, twenty-two million, four hundred two thousand, two hundred one".