216351842 has 16 divisors (see below), whose sum is σ = 372815232. Its totient is φ = 92240640.

The previous prime is 216351833. The next prime is 216351847. The reversal of 216351842 is 248153612.

It is a junction number, because it is equal to n+sod(n) for n = 216351799 and 216351808.

It is not an unprimeable number, because it can be changed into a prime (216351847) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 37334 + ... + 42737.

It is an arithmetic number, because the mean of its divisors is an integer number (23300952).

Almost surely, 2^216351842 is an apocalyptic number.

216351842 is a deficient number, since it is larger than the sum of its proper divisors (156463390).

216351842 is a wasteful number, since it uses less digits than its factorization.

216351842 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 80273.

The product of its digits is 11520, while the sum is 32.

The square root of 216351842 is about 14708.9034941426. The cubic root of 216351842 is about 600.3256029023.

The spelling of 216351842 in words is "two hundred sixteen million, three hundred fifty-one thousand, eight hundred forty-two".