52421869 has 2 divisors, whose sum is σ = 52421870. Its totient is φ = 52421868.

The previous prime is 52421867. The next prime is 52421891. The reversal of 52421869 is 96812425.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 40793769 + 11628100 = 6387^2 + 3410^2 .

It is a cyclic number.

It is not a de Polignac number, because 52421869 - 2¹ = 52421867 is a prime.

It is a super-2 number, since 2×52421869² = 5496104698906322, which contains 22 as substring.

Together with 52421867, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (52421867) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 26210934 + 26210935.

It is an arithmetic number, because the mean of its divisors is an integer number (26210935).

Almost surely, 2^52421869 is an apocalyptic number.

It is an amenable number.

52421869 is a deficient number, since it is larger than the sum of its proper divisors (1).

52421869 is an equidigital number, since it uses as much as digits as its factorization.

52421869 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 34560, while the sum is 37.

The square root of 52421869 is about 7240.2948144395. The cubic root of 52421869 is about 374.2577769528.

The spelling of 52421869 in words is "fifty-two million, four hundred twenty-one thousand, eight hundred sixty-nine".