52110021 has 4 divisors (see below), whose sum is σ = 69480032. Its totient is φ = 34740012.

The previous prime is 52110017. The next prime is 52110067. The reversal of 52110021 is 12001125.

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 not a de Polignac number, because 52110021 - 2² = 52110017 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 52109979 and 52110006.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (52110001) 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, 8685001 + ... + 8685006.

It is an arithmetic number, because the mean of its divisors is an integer number (17370008).

Almost surely, 2^52110021 is an apocalyptic number.

It is an amenable number.

52110021 is a deficient number, since it is larger than the sum of its proper divisors (17370011).

52110021 is a wasteful number, since it uses less digits than its factorization.

52110021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17370010.

The product of its (nonzero) digits is 20, while the sum is 12.

The square root of 52110021 is about 7218.7271038598. The cubic root of 52110021 is about 373.5141703808.

Adding to 52110021 its reverse (12001125), we get a palindrome (64111146).

The spelling of 52110021 in words is "fifty-two million, one hundred ten thousand, twenty-one".