13245220487 has 4 divisors (see below), whose sum is σ = 13672485696. Its totient is φ = 12817955280.

The previous prime is 13245220477. The next prime is 13245220493. The reversal of 13245220487 is 78402254231.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-13245220487 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 13245220487.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13245220477) 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, 213632558 + ... + 213632619.

It is an arithmetic number, because the mean of its divisors is an integer number (3418121424).

Almost surely, 2^13245220487 is an apocalyptic number.

13245220487 is a deficient number, since it is larger than the sum of its proper divisors (427265209).

13245220487 is an equidigital number, since it uses as much as digits as its factorization.

13245220487 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 427265208.

The product of its (nonzero) digits is 107520, while the sum is 38.

The spelling of 13245220487 in words is "thirteen billion, two hundred forty-five million, two hundred twenty thousand, four hundred eighty-seven".