25211313243 has 6 divisors (see below), whose sum is σ = 36416341364. Its totient is φ = 16807542156.

The previous prime is 25211313223. The next prime is 25211313251. The reversal of 25211313243 is 34231311252.

25211313243 is a `hidden beast` number, since 2 + 521 + 1 + 3 + 132 + 4 + 3 = 666.

It is not a de Polignac number, because 25211313243 - 2²⁵ = 25177758811 is a prime.

It is a super-2 number, since 2×25211313243² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (25211313203) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1400628505 + ... + 1400628522.

Almost surely, 2^25211313243 is an apocalyptic number.

25211313243 is a deficient number, since it is larger than the sum of its proper divisors (11205028121).

25211313243 is a wasteful number, since it uses less digits than its factorization.

25211313243 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2801257033 (or 2801257030 counting only the distinct ones).

The product of its digits is 4320, while the sum is 27.

Adding to 25211313243 its reverse (34231311252), we get a palindrome (59442624495).

It can be divided in two parts, 252113 and 13243, that added together give a triangular number (265356 = T₇₂₈).

The spelling of 25211313243 in words is "twenty-five billion, two hundred eleven million, three hundred thirteen thousand, two hundred forty-three".