25248143631 has 4 divisors (see below), whose sum is σ = 33664191512. Its totient is φ = 16832095752.

The previous prime is 25248143593. The next prime is 25248143639. The reversal of 25248143631 is 13634184252.

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

It is not a de Polignac number, because 25248143631 - 2¹⁰ = 25248142607 is a prime.

It is a super-2 number, since 2×25248143631² (a number of 22 digits) contains 22 as substring.

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 25248143631.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25248143639) 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, 4208023936 + ... + 4208023941.

It is an arithmetic number, because the mean of its divisors is an integer number (8416047878).

Almost surely, 2^25248143631 is an apocalyptic number.

25248143631 is a deficient number, since it is larger than the sum of its proper divisors (8416047881).

25248143631 is an equidigital number, since it uses as much as digits as its factorization.

25248143631 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8416047880.

The product of its digits is 138240, while the sum is 39.

The spelling of 25248143631 in words is "twenty-five billion, two hundred forty-eight million, one hundred forty-three thousand, six hundred thirty-one".