25024535531 has 4 divisors (see below), whose sum is σ = 25048761672. Its totient is φ = 25000309392.

The previous prime is 25024535521. The next prime is 25024535539. The reversal of 25024535531 is 13553542052.

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 25024535531 - 2¹⁴ = 25024519147 is a prime.

It is a super-2 number, since 2×25024535531² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 25024535491 and 25024535500.

It is not an unprimeable number, because it can be changed into a prime (25024535539) 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, 12111521 + ... + 12113586.

It is an arithmetic number, because the mean of its divisors is an integer number (6262190418).

Almost surely, 2^25024535531 is an apocalyptic number.

25024535531 is a deficient number, since it is larger than the sum of its proper divisors (24226141).

25024535531 is a wasteful number, since it uses less digits than its factorization.

25024535531 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24226140.

The product of its (nonzero) digits is 90000, while the sum is 35.

The spelling of 25024535531 in words is "twenty-five billion, twenty-four million, five hundred thirty-five thousand, five hundred thirty-one".