52270021 has 4 divisors (see below), whose sum is σ = 52651692. Its totient is φ = 51888352.

The previous prime is 52270003. The next prime is 52270027. The reversal of 52270021 is 12007225.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 18792225 + 33477796 = 4335^2 + 5786^2 .

It is a cyclic number.

It is not a de Polignac number, because 52270021 - 2⁵ = 52269989 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (52270027) 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, 190630 + ... + 190903.

It is an arithmetic number, because the mean of its divisors is an integer number (13162923).

Almost surely, 2^52270021 is an apocalyptic number.

It is an amenable number.

52270021 is a deficient number, since it is larger than the sum of its proper divisors (381671).

52270021 is a wasteful number, since it uses less digits than its factorization.

52270021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 381670.

The product of its (nonzero) digits is 280, while the sum is 19.

The square root of 52270021 is about 7229.8008962903. The cubic root of 52270021 is about 373.8960624175.

Adding to 52270021 its reverse (12007225), we get a palindrome (64277246).

The spelling of 52270021 in words is "fifty-two million, two hundred seventy thousand, twenty-one".