215450513 has 4 divisors (see below), whose sum is σ = 215480628. Its totient is φ = 215420400.

The previous prime is 215450489. The next prime is 215450549. The reversal of 215450513 is 315054512.

215450513 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 113379904 + 102070609 = 10648^2 + 10103^2 .

It is a cyclic number.

It is not a de Polignac number, because 215450513 - 2¹⁰ = 215449489 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (215450413) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2495 + ... + 20907.

It is an arithmetic number, because the mean of its divisors is an integer number (53870157).

Almost surely, 2^215450513 is an apocalyptic number.

It is an amenable number.

215450513 is a deficient number, since it is larger than the sum of its proper divisors (30115).

215450513 is a wasteful number, since it uses less digits than its factorization.

215450513 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30114.

The product of its (nonzero) digits is 3000, while the sum is 26.

The square root of 215450513 is about 14678.2326252175. The cubic root of 215450513 is about 599.4907836943.

The spelling of 215450513 in words is "two hundred fifteen million, four hundred fifty thousand, five hundred thirteen".