25241025533 has 4 divisors (see below), whose sum is σ = 25267512348. Its totient is φ = 25214538720.

The previous prime is 25241025497. The next prime is 25241025547. The reversal of 25241025533 is 33552014252.

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

It can be written as a sum of positive squares in 2 ways, for example, as 7701466564 + 17539558969 = 87758^2 + 132437^2 .

It is a cyclic number.

It is not a de Polignac number, because 25241025533 - 2²⁸ = 24972590077 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 25241025533.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25241025583) 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, 13241978 + ... + 13243883.

It is an arithmetic number, because the mean of its divisors is an integer number (6316878087).

Almost surely, 2^25241025533 is an apocalyptic number.

It is an amenable number.

25241025533 is a deficient number, since it is larger than the sum of its proper divisors (26486815).

25241025533 is an equidigital number, since it uses as much as digits as its factorization.

25241025533 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26486814.

The product of its (nonzero) digits is 36000, while the sum is 32.

Adding to 25241025533 its reverse (33552014252), we get a palindrome (58793039785).

The spelling of 25241025533 in words is "twenty-five billion, two hundred forty-one million, twenty-five thousand, five hundred thirty-three".