216472558 has 4 divisors (see below), whose sum is σ = 324708840. Its totient is φ = 108236278.

The previous prime is 216472537. The next prime is 216472603. The reversal of 216472558 is 855274612.

It is a semiprime because it is the product of two primes.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a self number, because there is not a number n which added to its sum of digits gives 216472558.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 54118138 + ... + 54118141.

It is an arithmetic number, because the mean of its divisors is an integer number (81177210).

Almost surely, 2^216472558 is an apocalyptic number.

216472558 is a deficient number, since it is larger than the sum of its proper divisors (108236282).

216472558 is a wasteful number, since it uses less digits than its factorization.

216472558 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 108236281.

The product of its digits is 134400, while the sum is 40.

The square root of 216472558 is about 14713.0064228899. The cubic root of 216472558 is about 600.4372350022.

The spelling of 216472558 in words is "two hundred sixteen million, four hundred seventy-two thousand, five hundred fifty-eight".