216883478 has 16 divisors (see below), whose sum is σ = 372307104. Its totient is φ = 92823360.

The previous prime is 216883463. The next prime is 216883483. The reversal of 216883478 is 874388612.

216883478 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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, 476 + ... + 20832.

It is an arithmetic number, because the mean of its divisors is an integer number (23269194).

Almost surely, 2^216883478 is an apocalyptic number.

216883478 is a deficient number, since it is larger than the sum of its proper divisors (155423626).

216883478 is a wasteful number, since it uses less digits than its factorization.

216883478 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21127.

The product of its digits is 516096, while the sum is 47.

The square root of 216883478 is about 14726.9643171972. The cubic root of 216883478 is about 600.8169224100.

The spelling of 216883478 in words is "two hundred sixteen million, eight hundred eighty-three thousand, four hundred seventy-eight".