53820111 has 8 divisors (see below), whose sum is σ = 72077184. Its totient is φ = 35721560.

The previous prime is 53820101. The next prime is 53820139. The reversal of 53820111 is 11102835.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 53820111 - 2⁹ = 53819599 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (53820101) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 38835 + ... + 40196.

It is an arithmetic number, because the mean of its divisors is an integer number (9009648).

Almost surely, 2^53820111 is an apocalyptic number.

53820111 is a deficient number, since it is larger than the sum of its proper divisors (18257073).

53820111 is a wasteful number, since it uses less digits than its factorization.

53820111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 79261.

The product of its (nonzero) digits is 240, while the sum is 21.

The square root of 53820111 is about 7336.2191215912. The cubic root of 53820111 is about 377.5561333424.

Adding to 53820111 its reverse (11102835), we get a palindrome (64922946).

The spelling of 53820111 in words is "fifty-three million, eight hundred twenty thousand, one hundred eleven".