916215851 has 4 divisors (see below), whose sum is σ = 927813600. Its totient is φ = 904618104.

The previous prime is 916215841. The next prime is 916215857. The reversal of 916215851 is 158512619.

916215851 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a cyclic number.

It is not a de Polignac number, because 916215851 - 2²⁶ = 849106987 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (916215857) 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, 5798756 + ... + 5798913.

It is an arithmetic number, because the mean of its divisors is an integer number (231953400).

Almost surely, 2^916215851 is an apocalyptic number.

916215851 is a deficient number, since it is larger than the sum of its proper divisors (11597749).

916215851 is a wasteful number, since it uses less digits than its factorization.

916215851 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11597748.

The product of its digits is 21600, while the sum is 38.

The square root of 916215851 is about 30269.0576496858. The cubic root of 916215851 is about 971.2535078471.

The spelling of 916215851 in words is "nine hundred sixteen million, two hundred fifteen thousand, eight hundred fifty-one".