52219991 has 2 divisors, whose sum is σ = 52219992. Its totient is φ = 52219990.

The previous prime is 52219969. The next prime is 52219997. The reversal of 52219991 is 19991225.

52219991 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 52219991 - 2¹⁸ = 51957847 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (52219997) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 26109995 + 26109996.

It is an arithmetic number, because the mean of its divisors is an integer number (26109996).

Almost surely, 2^52219991 is an apocalyptic number.

52219991 is a deficient number, since it is larger than the sum of its proper divisors (1).

52219991 is an equidigital number, since it uses as much as digits as its factorization.

52219991 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 14580, while the sum is 38.

The square root of 52219991 is about 7226.3400833340. The cubic root of 52219991 is about 373.7767333965.

The spelling of 52219991 in words is "fifty-two million, two hundred nineteen thousand, nine hundred ninety-one".