52116021 has 16 divisors (see below), whose sum is σ = 78477120. Its totient is φ = 34173360.

The previous prime is 52115981. The next prime is 52116023. The reversal of 52116021 is 12061125.

52116021 is a `hidden beast` number, since 52 + 11 + 602 + 1 = 666.

It is not a de Polignac number, because 52116021 - 2⁷ = 52115893 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 52115985 and 52116003.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (52116023) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 14175 + ... + 17468.

It is an arithmetic number, because the mean of its divisors is an integer number (4904820).

Almost surely, 2^52116021 is an apocalyptic number.

It is an amenable number.

52116021 is a deficient number, since it is larger than the sum of its proper divisors (26361099).

52116021 is a wasteful number, since it uses less digits than its factorization.

52116021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31713 (or 31707 counting only the distinct ones).

The product of its (nonzero) digits is 120, while the sum is 18.

The square root of 52116021 is about 7219.1426776315. The cubic root of 52116021 is about 373.5285054291.

Adding to 52116021 its reverse (12061125), we get a palindrome (64177146).

The spelling of 52116021 in words is "fifty-two million, one hundred sixteen thousand, twenty-one".