13531045520 has 40 divisors (see below), whose sum is σ = 31486764480. Its totient is φ = 5407758720.

The previous prime is 13531045513. The next prime is 13531045531. The reversal of 13531045520 is 2554013531.

It is a tau number, because it is divible by the number of its divisors (40).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 21461 + ... + 165899.

It is an arithmetic number, because the mean of its divisors is an integer number (787169112).

Almost surely, 2^13531045520 is an apocalyptic number.

13531045520 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

13531045520 is an abundant number, since it is smaller than the sum of its proper divisors (17955718960).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

13531045520 is a wasteful number, since it uses less digits than its factorization.

13531045520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 145623 (or 145617 counting only the distinct ones).

The product of its (nonzero) digits is 9000, while the sum is 29.

The spelling of 13531045520 in words is "thirteen billion, five hundred thirty-one million, forty-five thousand, five hundred twenty".