25431215401 has 16 divisors (see below), whose sum is σ = 25954790400. Its totient is φ = 24913482048.

The previous prime is 25431215389. The next prime is 25431215413. The reversal of 25431215401 is 10451213452.

It is an interprime number because it is at equal distance from previous prime (25431215389) and next prime (25431215413).

It is a cyclic number.

It is not a de Polignac number, because 25431215401 - 2¹⁵ = 25431182633 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 25431215401.

It is not an unprimeable number, because it can be changed into a prime (25431215471) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5529835 + ... + 5534431.

It is an arithmetic number, because the mean of its divisors is an integer number (1622174400).

Almost surely, 2^25431215401 is an apocalyptic number.

It is an amenable number.

25431215401 is a deficient number, since it is larger than the sum of its proper divisors (523574999).

25431215401 is a wasteful number, since it uses less digits than its factorization.

25431215401 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5208.

The product of its (nonzero) digits is 4800, while the sum is 28.

Adding to 25431215401 its reverse (10451213452), we get a palindrome (35882428853).

The spelling of 25431215401 in words is "twenty-five billion, four hundred thirty-one million, two hundred fifteen thousand, four hundred one".