107216391 has 4 divisors (see below), whose sum is σ = 142955192. Its totient is φ = 71477592.

The previous prime is 107216387. The next prime is 107216401. The reversal of 107216391 is 193612701.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 107216391 - 2² = 107216387 is a prime.

It is a super-2 number, since 2×107216391² = 22990708998129762, which contains 22 as substring.

It is a Duffinian number.

It is a zygodrome in base 2.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (107216381) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 17869396 + ... + 17869401.

It is an arithmetic number, because the mean of its divisors is an integer number (35738798).

Almost surely, 2^107216391 is an apocalyptic number.

107216391 is a deficient number, since it is larger than the sum of its proper divisors (35738801).

107216391 is an equidigital number, since it uses as much as digits as its factorization.

107216391 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35738800.

The product of its (nonzero) digits is 2268, while the sum is 30.

The square root of 107216391 is about 10354.5348036500. The cubic root of 107216391 is about 475.0657578399.

The spelling of 107216391 in words is "one hundred seven million, two hundred sixteen thousand, three hundred ninety-one".