13240503521 has 8 divisors (see below), whose sum is σ = 15132783360. Its totient is φ = 11348418528.

The previous prime is 13240503517. The next prime is 13240503547. The reversal of 13240503521 is 12530504231.

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 not a de Polignac number, because 13240503521 - 2² = 13240503517 is a prime.

It is a super-2 number, since 2×13240503521² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (13240503511) 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, 152120 + ... + 222758.

It is an arithmetic number, because the mean of its divisors is an integer number (1891597920).

Almost surely, 2^13240503521 is an apocalyptic number.

It is an amenable number.

13240503521 is a deficient number, since it is larger than the sum of its proper divisors (1892279839).

13240503521 is an equidigital number, since it uses as much as digits as its factorization.

13240503521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 97423.

The product of its (nonzero) digits is 3600, while the sum is 26.

The spelling of 13240503521 in words is "thirteen billion, two hundred forty million, five hundred three thousand, five hundred twenty-one".