215030811 has 16 divisors (see below), whose sum is σ = 292236800. Its totient is φ = 140613408.

The previous prime is 215030797. The next prime is 215030857. The reversal of 215030811 is 118030512.

It is not a de Polignac number, because 215030811 - 2⁵ = 215030779 is a prime.

It is not an unprimeable number, because it can be changed into a prime (215030891) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 34320 + ... + 40098.

It is an arithmetic number, because the mean of its divisors is an integer number (18264800).

Almost surely, 2^215030811 is an apocalyptic number.

215030811 is a deficient number, since it is larger than the sum of its proper divisors (77205989).

215030811 is a wasteful number, since it uses less digits than its factorization.

215030811 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6018.

The product of its (nonzero) digits is 240, while the sum is 21.

The square root of 215030811 is about 14663.9289073563. The cubic root of 215030811 is about 599.1012572190.

The spelling of 215030811 in words is "two hundred fifteen million, thirty thousand, eight hundred eleven".