13531215066 has 16 divisors (see below), whose sum is σ = 28486768800. Its totient is φ = 4273015248.

The previous prime is 13531215053. The next prime is 13531215083. The reversal of 13531215066 is 66051213531.

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, 59347321 + ... + 59347548.

It is an arithmetic number, because the mean of its divisors is an integer number (1780423050).

Almost surely, 2^13531215066 is an apocalyptic number.

13531215066 is an abundant number, since it is smaller than the sum of its proper divisors (14955553734).

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

13531215066 is a wasteful number, since it uses less digits than its factorization.

13531215066 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 118694893.

The product of its (nonzero) digits is 16200, while the sum is 33.

Adding to 13531215066 its reverse (66051213531), we get a palindrome (79582428597).

The spelling of 13531215066 in words is "thirteen billion, five hundred thirty-one million, two hundred fifteen thousand, sixty-six".