25313055531 has 8 divisors (see below), whose sum is σ = 33785647104. Its totient is φ = 16857917160.

The previous prime is 25313055529. The next prime is 25313055553. The reversal of 25313055531 is 13555031352.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 25313055531 - 2¹ = 25313055529 is a prime.

It is a super-2 number, since 2×25313055531² (a number of 22 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 25313055492 and 25313055501.

It is not an unprimeable number, because it can be changed into a prime (25313055631) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4359915 + ... + 4365716.

It is an arithmetic number, because the mean of its divisors is an integer number (4223205888).

Almost surely, 2^25313055531 is an apocalyptic number.

25313055531 is a deficient number, since it is larger than the sum of its proper divisors (8472591573).

25313055531 is an equidigital number, since it uses as much as digits as its factorization.

25313055531 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8726601.

The product of its (nonzero) digits is 33750, while the sum is 33.

Adding to 25313055531 its reverse (13555031352), we get a palindrome (38868086883).

The spelling of 25313055531 in words is "twenty-five billion, three hundred thirteen million, fifty-five thousand, five hundred thirty-one".