216488042 has 4 divisors (see below), whose sum is σ = 324732066. Its totient is φ = 108244020.

The previous prime is 216488039. The next prime is 216488057. The reversal of 216488042 is 240884612.

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., 133841761 + 82646281 = 11569^2 + 9091^2 .

It is a junction number, because it is equal to n+sod(n) for n = 216487993 and 216488011.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 54122009 + ... + 54122012.

Almost surely, 2^216488042 is an apocalyptic number.

216488042 is a deficient number, since it is larger than the sum of its proper divisors (108244024).

216488042 is a wasteful number, since it uses less digits than its factorization.

216488042 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 108244023.

The product of its (nonzero) digits is 24576, while the sum is 35.

The square root of 216488042 is about 14713.5326145695. The cubic root of 216488042 is about 600.4515508252.

The spelling of 216488042 in words is "two hundred sixteen million, four hundred eighty-eight thousand, forty-two".