105721316 has 12 divisors (see below), whose sum is σ = 185138688. Its totient is φ = 52824552.

The previous prime is 105721307. The next prime is 105721349. The reversal of 105721316 is 613127501.

It is a super-2 number, since 2×105721316² = 22353993313543712, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1796 + ... + 14651.

It is an arithmetic number, because the mean of its divisors is an integer number (15428224).

Almost surely, 2^105721316 is an apocalyptic number.

It is an amenable number.

105721316 is a deficient number, since it is larger than the sum of its proper divisors (79417372).

105721316 is a wasteful number, since it uses less digits than its factorization.

105721316 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18058 (or 18056 counting only the distinct ones).

The product of its (nonzero) digits is 1260, while the sum is 26.

The square root of 105721316 is about 10282.0871422100. The cubic root of 105721316 is about 472.8472346574.

Adding to 105721316 its reverse (613127501), we get a palindrome (718848817).

The spelling of 105721316 in words is "one hundred five million, seven hundred twenty-one thousand, three hundred sixteen".