1515135131020 has 48 divisors (see below), whose sum is σ = 3636556035840. Its totient is φ = 519441799104.

The previous prime is 1515135130981. The next prime is 1515135131021. The reversal of 1515135131020 is 201315315151.

It is a Harshad number since it is a multiple of its sum of digits (28).

It is a self number, because there is not a number n which added to its sum of digits gives 1515135131020.

It is not an unprimeable number, because it can be changed into a prime (1515135131021) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1912591 + ... + 2586169.

It is an arithmetic number, because the mean of its divisors is an integer number (75761584080).

Almost surely, 2^{1515135131020} is an apocalyptic number.

1515135131020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1515135131020 is an abundant number, since it is smaller than the sum of its proper divisors (2121420904820).

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

1515135131020 is a wasteful number, since it uses less digits than its factorization.

1515135131020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 689662 (or 689660 counting only the distinct ones).

The product of its (nonzero) digits is 2250, while the sum is 28.

The spelling of 1515135131020 in words is "one trillion, five hundred fifteen billion, one hundred thirty-five million, one hundred thirty-one thousand, twenty".