216590042 has 8 divisors (see below), whose sum is σ = 327921696. Its totient is φ = 107282812.

The previous prime is 216590027. The next prime is 216590069. The reversal of 216590042 is 240095612.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×216590042² = 93822492587123528, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 216589987 and 216590014.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 505838 + ... + 506265.

It is an arithmetic number, because the mean of its divisors is an integer number (40990212).

Almost surely, 2^216590042 is an apocalyptic number.

216590042 is a deficient number, since it is larger than the sum of its proper divisors (111331654).

216590042 is a wasteful number, since it uses less digits than its factorization.

216590042 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1012212.

The product of its (nonzero) digits is 4320, while the sum is 29.

The square root of 216590042 is about 14716.9984032071. The cubic root of 216590042 is about 600.5458384685.

The spelling of 216590042 in words is "two hundred sixteen million, five hundred ninety thousand, forty-two".