1520345231020 has 72 divisors (see below), whose sum is σ = 4010695893792. Its totient is φ = 473873832960.

The previous prime is 1520345231017. The next prime is 1520345231047. The reversal of 1520345231020 is 201325430251.

It is a super-2 number, since 2×1520345231020² (a number of 25 digits) contains 22 as substring.

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 1520345231020.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 44857477 + ... + 44891356.

It is an arithmetic number, because the mean of its divisors is an integer number (55704109636).

Almost surely, 2^{1520345231020} is an apocalyptic number.

1520345231020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1520345231020 is an abundant number, since it is smaller than the sum of its proper divisors (2490350662772).

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

1520345231020 is a wasteful number, since it uses less digits than its factorization.

1520345231020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 89748871 (or 89748858 counting only the distinct ones).

The product of its (nonzero) digits is 7200, while the sum is 28.

The spelling of 1520345231020 in words is "one trillion, five hundred twenty billion, three hundred forty-five million, two hundred thirty-one thousand, twenty".