216051194 has 4 divisors (see below), whose sum is σ = 324076794. Its totient is φ = 108025596.

The previous prime is 216051169. The next prime is 216051197. The reversal of 216051194 is 491150612.

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

It can be written as a sum of positive squares in only one way, i.e., 202692169 + 13359025 = 14237^2 + 3655^2 .

It is not an unprimeable number, because it can be changed into a prime (216051197) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 54012797 + ... + 54012800.

Almost surely, 2^216051194 is an apocalyptic number.

216051194 is a deficient number, since it is larger than the sum of its proper divisors (108025600).

216051194 is a wasteful number, since it uses less digits than its factorization.

216051194 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 108025599.

The product of its (nonzero) digits is 2160, while the sum is 29.

The square root of 216051194 is about 14698.6800087627. The cubic root of 216051194 is about 600.0473981075.

The spelling of 216051194 in words is "two hundred sixteen million, fifty-one thousand, one hundred ninety-four".