215473540000 has 60 divisors (see below), whose sum is σ = 530097278634. Its totient is φ = 86189408000.

The previous prime is 215473539971. The next prime is 215473540013. The reversal of 215473540000 is 45374512.

It can be written as a sum of positive squares in 5 ways, for example, as 9862078864 + 205611461136 = 99308^2 + 453444^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 5366839 + ... + 5406838.

Almost surely, 2^215473540000 is an apocalyptic number.

215473540000 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

215473540000 is an abundant number, since it is smaller than the sum of its proper divisors (314623738634).

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

215473540000 is an equidigital number, since it uses as much as digits as its factorization.

215473540000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10773707 (or 10773684 counting only the distinct ones).

The product of its (nonzero) digits is 16800, while the sum is 31.

The spelling of 215473540000 in words is "two hundred fifteen billion, four hundred seventy-three million, five hundred forty thousand".