53821113 has 4 divisors (see below), whose sum is σ = 71761488. Its totient is φ = 35880740.

The previous prime is 53821087. The next prime is 53821121. The reversal of 53821113 is 31112835.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 53821113 - 2⁶ = 53821049 is a prime.

It is not an unprimeable number, because it can be changed into a prime (53821123) 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, 8970183 + ... + 8970188.

It is an arithmetic number, because the mean of its divisors is an integer number (17940372).

Almost surely, 2^53821113 is an apocalyptic number.

It is an amenable number.

53821113 is a deficient number, since it is larger than the sum of its proper divisors (17940375).

53821113 is a wasteful number, since it uses less digits than its factorization.

53821113 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17940374.

The product of its digits is 720, while the sum is 24.

The square root of 53821113 is about 7336.2874125814. The cubic root of 53821113 is about 377.5584763878.

Adding to 53821113 its reverse (31112835), we get a palindrome (84933948).

The spelling of 53821113 in words is "fifty-three million, eight hundred twenty-one thousand, one hundred thirteen".