215387134 has 16 divisors (see below), whose sum is σ = 338629248. Its totient is φ = 102552472.

The previous prime is 215387119. The next prime is 215387143. The reversal of 215387134 is 431783512.

It is a self number, because there is not a number n which added to its sum of digits gives 215387134.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 129 + ... + 20755.

It is an arithmetic number, because the mean of its divisors is an integer number (21164328).

Almost surely, 2^215387134 is an apocalyptic number.

215387134 is a deficient number, since it is larger than the sum of its proper divisors (123242114).

215387134 is a wasteful number, since it uses less digits than its factorization.

215387134 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20879.

The product of its digits is 20160, while the sum is 34.

The square root of 215387134 is about 14676.0735212113. The cubic root of 215387134 is about 599.4319939330.

The spelling of 215387134 in words is "two hundred fifteen million, three hundred eighty-seven thousand, one hundred thirty-four".