25212641243 has 4 divisors (see below), whose sum is σ = 25245948000. Its totient is φ = 25179334488.

The previous prime is 25212641219. The next prime is 25212641249. The reversal of 25212641243 is 34214621252.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-25212641243 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (25212641249) 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, 16652243 + ... + 16653756.

It is an arithmetic number, because the mean of its divisors is an integer number (6311487000).

Almost surely, 2^25212641243 is an apocalyptic number.

25212641243 is a deficient number, since it is larger than the sum of its proper divisors (33306757).

25212641243 is an equidigital number, since it uses as much as digits as its factorization.

25212641243 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33306756.

The product of its digits is 23040, while the sum is 32.

The spelling of 25212641243 in words is "twenty-five billion, two hundred twelve million, six hundred forty-one thousand, two hundred forty-three".