25135442034531 has 4 divisors (see below), whose sum is σ = 33513922712712. Its totient is φ = 16756961356352.

The previous prime is 25135442034491. The next prime is 25135442034539. The reversal of 25135442034531 is 13543024453152.

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

It is a cyclic number.

It is not a de Polignac number, because 25135442034531 - 2²⁷ = 25135307816803 is a prime.

It is a super-2 number, since 2×25135442034531² (a number of 28 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (25135442034539) 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, 4189240339086 + ... + 4189240339091.

It is an arithmetic number, because the mean of its divisors is an integer number (8378480678178).

Almost surely, 2^{25135442034531} is an apocalyptic number.

25135442034531 is a deficient number, since it is larger than the sum of its proper divisors (8378480678181).

25135442034531 is an equidigital number, since it uses as much as digits as its factorization.

25135442034531 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8378480678180.

The product of its (nonzero) digits is 864000, while the sum is 42.

Adding to 25135442034531 its reverse (13543024453152), we get a palindrome (38678466487683).

The spelling of 25135442034531 in words is "twenty-five trillion, one hundred thirty-five billion, four hundred forty-two million, thirty-four thousand, five hundred thirty-one".