2158916 has 6 divisors (see below), whose sum is σ = 3778110. Its totient is φ = 1079456.

The previous prime is 2158909. The next prime is 2158921. The reversal of 2158916 is 6198512.

It can be written as a sum of positive squares in only one way, i.e., 1960000 + 198916 = 1400^2 + 446^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 269861 + ... + 269868.

It is an arithmetic number, because the mean of its divisors is an integer number (629685).

2^2158916 is an apocalyptic number.

It is an amenable number.

2158916 is a deficient number, since it is larger than the sum of its proper divisors (1619194).

2158916 is a wasteful number, since it uses less digits than its factorization.

2158916 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 539733 (or 539731 counting only the distinct ones).

The product of its digits is 4320, while the sum is 32.

The square root of 2158916 is about 1469.3250151005. The cubic root of 2158916 is about 129.2444536428.

The spelling of 2158916 in words is "two million, one hundred fifty-eight thousand, nine hundred sixteen".