25243463533 has 4 divisors (see below), whose sum is σ = 25249394880. Its totient is φ = 25237532188.

The previous prime is 25243463521. The next prime is 25243463561. The reversal of 25243463533 is 33536434252.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 25243463533 - 2⁵ = 25243463501 is a prime.

It is a super-2 number, since 2×25243463533² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25243463503) 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, 2959285 + ... + 2967802.

It is an arithmetic number, because the mean of its divisors is an integer number (6312348720).

Almost surely, 2^25243463533 is an apocalyptic number.

It is an amenable number.

25243463533 is a deficient number, since it is larger than the sum of its proper divisors (5931347).

25243463533 is an equidigital number, since it uses as much as digits as its factorization.

25243463533 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5931346.

The product of its digits is 777600, while the sum is 40.

Adding to 25243463533 its reverse (33536434252), we get a palindrome (58779897785).

The spelling of 25243463533 in words is "twenty-five billion, two hundred forty-three million, four hundred sixty-three thousand, five hundred thirty-three".