217113842 has 16 divisors (see below), whose sum is σ = 358798464. Its totient is φ = 97710000.

The previous prime is 217113833. The next prime is 217113847. The reversal of 217113842 is 248311712.

It is not an unprimeable number, because it can be changed into a prime (217113847) 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, 46634 + ... + 51077.

It is an arithmetic number, because the mean of its divisors is an integer number (22424904).

Almost surely, 2^217113842 is an apocalyptic number.

217113842 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

217113842 is a deficient number, since it is larger than the sum of its proper divisors (141684622).

217113842 is a wasteful number, since it uses less digits than its factorization.

217113842 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 97825.

The product of its digits is 2688, while the sum is 29.

The square root of 217113842 is about 14734.7834052625. The cubic root of 217113842 is about 601.0295674926.

The spelling of 217113842 in words is "two hundred seventeen million, one hundred thirteen thousand, eight hundred forty-two".