52866421 has 2 divisors, whose sum is σ = 52866422. Its totient is φ = 52866420.

The previous prime is 52866403. The next prime is 52866431. The reversal of 52866421 is 12466825.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 31798321 + 21068100 = 5639^2 + 4590^2 .

It is a cyclic number.

It is not a de Polignac number, because 52866421 - 2⁵ = 52866389 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (52866431) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 26433210 + 26433211.

It is an arithmetic number, because the mean of its divisors is an integer number (26433211).

Almost surely, 2^52866421 is an apocalyptic number.

It is an amenable number.

52866421 is a deficient number, since it is larger than the sum of its proper divisors (1).

52866421 is an equidigital number, since it uses as much as digits as its factorization.

52866421 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 23040, while the sum is 34.

The square root of 52866421 is about 7270.9298580030. The cubic root of 52866421 is about 375.3127370415.

The spelling of 52866421 in words is "fifty-two million, eight hundred sixty-six thousand, four hundred twenty-one".