13240534731 has 8 divisors (see below), whose sum is σ = 18583206720. Its totient is φ = 8362442952.

The previous prime is 13240534721. The next prime is 13240534757. The reversal of 13240534731 is 13743504231.

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 13240534731 - 2⁶ = 13240534667 is a prime.

It is a super-2 number, since 2×13240534731² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 13240534692 and 13240534701.

It is not an unprimeable number, because it can be changed into a prime (13240534721) 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, 116144985 + ... + 116145098.

It is an arithmetic number, because the mean of its divisors is an integer number (2322900840).

Almost surely, 2^13240534731 is an apocalyptic number.

13240534731 is a deficient number, since it is larger than the sum of its proper divisors (5342671989).

13240534731 is a wasteful number, since it uses less digits than its factorization.

13240534731 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 232290105.

The product of its (nonzero) digits is 30240, while the sum is 33.

The spelling of 13240534731 in words is "thirteen billion, two hundred forty million, five hundred thirty-four thousand, seven hundred thirty-one".