215040520 has 32 divisors (see below), whose sum is σ = 491068800. Its totient is φ = 84731328.

The previous prime is 215040517. The next prime is 215040523. The reversal of 215040520 is 25040512.

It is an interprime number because it is at equal distance from previous prime (215040517) and next prime (215040523).

It is not an unprimeable number, because it can be changed into a prime (215040523) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 37440 + ... + 42799.

It is an arithmetic number, because the mean of its divisors is an integer number (15345900).

Almost surely, 2^215040520 is an apocalyptic number.

215040520 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

215040520 is an abundant number, since it is smaller than the sum of its proper divisors (276028280).

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

215040520 is a wasteful number, since it uses less digits than its factorization.

215040520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 80317 (or 80313 counting only the distinct ones).

The product of its (nonzero) digits is 400, while the sum is 19.

The square root of 215040520 is about 14664.2599540516. The cubic root of 215040520 is about 599.1102738905.

The spelling of 215040520 in words is "two hundred fifteen million, forty thousand, five hundred twenty".