216207974 has 4 divisors (see below), whose sum is σ = 324311964. Its totient is φ = 108103986.

The previous prime is 216207941. The next prime is 216207977. The reversal of 216207974 is 479702612.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (216207977) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 54051992 + ... + 54051995.

It is an arithmetic number, because the mean of its divisors is an integer number (81077991).

Almost surely, 2^216207974 is an apocalyptic number.

216207974 is a deficient number, since it is larger than the sum of its proper divisors (108103990).

216207974 is a wasteful number, since it uses less digits than its factorization.

216207974 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 108103989.

The product of its (nonzero) digits is 42336, while the sum is 38.

The square root of 216207974 is about 14704.0121735532. The cubic root of 216207974 is about 600.1925067472.

The spelling of 216207974 in words is "two hundred sixteen million, two hundred seven thousand, nine hundred seventy-four".