213028815 has 8 divisors (see below), whose sum is σ = 340846128. Its totient is φ = 113615360.

The previous prime is 213028811. The next prime is 213028847. The reversal of 213028815 is 518820312.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 213028815 - 2² = 213028811 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (213028811) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 7100946 + ... + 7100975.

It is an arithmetic number, because the mean of its divisors is an integer number (42605766).

Almost surely, 2^213028815 is an apocalyptic number.

213028815 is a deficient number, since it is larger than the sum of its proper divisors (127817313).

213028815 is a wasteful number, since it uses less digits than its factorization.

213028815 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14201929.

The product of its (nonzero) digits is 3840, while the sum is 30.

The square root of 213028815 is about 14595.5066715753. The cubic root of 213028815 is about 597.2361912611.

The spelling of 213028815 in words is "two hundred thirteen million, twenty-eight thousand, eight hundred fifteen".