25343513531 has 8 divisors (see below), whose sum is σ = 29289454560. Its totient is φ = 21478932288.

The previous prime is 25343513513. The next prime is 25343513537. The reversal of 25343513531 is 13531534352.

It is a happy number.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-25343513531 is a prime.

It is a super-2 number, since 2×25343513531² (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 = 25343513491 and 25343513500.

It is not an unprimeable number, because it can be changed into a prime (25343513537) 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, 20339276 + ... + 20340521.

It is an arithmetic number, because the mean of its divisors is an integer number (3661181820).

Almost surely, 2^25343513531 is an apocalyptic number.

25343513531 is a deficient number, since it is larger than the sum of its proper divisors (3945941029).

25343513531 is an equidigital number, since it uses as much as digits as its factorization.

25343513531 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40679893.

The product of its digits is 81000, while the sum is 35.

The spelling of 25343513531 in words is "twenty-five billion, three hundred forty-three million, five hundred thirteen thousand, five hundred thirty-one".