215472871 has 16 divisors (see below), whose sum is σ = 231580800. Its totient is φ = 200094048.

The previous prime is 215472869. The next prime is 215472883. The reversal of 215472871 is 178274512.

It is a cyclic number.

It is not a de Polignac number, because 215472871 - 2¹ = 215472869 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 215472871.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (215472811) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 82260 + ... + 84838.

It is an arithmetic number, because the mean of its divisors is an integer number (14473800).

Almost surely, 2^215472871 is an apocalyptic number.

215472871 is a deficient number, since it is larger than the sum of its proper divisors (16107929).

215472871 is a wasteful number, since it uses less digits than its factorization.

215472871 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2718.

The product of its digits is 31360, while the sum is 37.

The square root of 215472871 is about 14678.9942094137. The cubic root of 215472871 is about 599.5115200127.

The spelling of 215472871 in words is "two hundred fifteen million, four hundred seventy-two thousand, eight hundred seventy-one".