216497047042 has 16 divisors (see below), whose sum is σ = 327126296952. Its totient is φ = 107457096960.

The previous prime is 216497047033. The next prime is 216497047061. The reversal of 216497047042 is 240740794612.

It can be written as a sum of positive squares in 4 ways, for example, as 24529511161 + 191967535881 = 156619^2 + 438141^2 .

It is a junction number, because it is equal to n+sod(n) for n = 216497046983 and 216497047001.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 335223 + ... + 738490.

Almost surely, 2^216497047042 is an apocalyptic number.

216497047042 is a deficient number, since it is larger than the sum of its proper divisors (110629249910).

216497047042 is a wasteful number, since it uses less digits than its factorization.

216497047042 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1074453.

The product of its (nonzero) digits is 677376, while the sum is 46.

The spelling of 216497047042 in words is "two hundred sixteen billion, four hundred ninety-seven million, forty-seven thousand, forty-two".