13531131015 has 16 divisors (see below), whose sum is σ = 21696580608. Its totient is φ = 7201012896.

The previous prime is 13531130983. The next prime is 13531131017. The reversal of 13531131015 is 51013113531.

It is a happy number.

It is not a de Polignac number, because 13531131015 - 2⁵ = 13531130983 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13531131017) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 967219 + ... + 981108.

It is an arithmetic number, because the mean of its divisors is an integer number (1356036288).

Almost surely, 2^13531131015 is an apocalyptic number.

13531131015 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

13531131015 is a deficient number, since it is larger than the sum of its proper divisors (8165449593).

13531131015 is a wasteful number, since it uses less digits than its factorization.

13531131015 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1948798.

The product of its (nonzero) digits is 675, while the sum is 24.

Adding to 13531131015 its reverse (51013113531), we get a palindrome (64544244546).

The spelling of 13531131015 in words is "thirteen billion, five hundred thirty-one million, one hundred thirty-one thousand, fifteen".