52249991 has 2 divisors, whose sum is σ = 52249992. Its totient is φ = 52249990.

The previous prime is 52249963. The next prime is 52250021. The reversal of 52249991 is 19994225.

It is a happy number.

52249991 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 52249991 - 2⁶ = 52249927 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 (52249091) 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, 26124995 + 26124996.

It is an arithmetic number, because the mean of its divisors is an integer number (26124996).

Almost surely, 2^52249991 is an apocalyptic number.

52249991 is a deficient number, since it is larger than the sum of its proper divisors (1).

52249991 is an equidigital number, since it uses as much as digits as its factorization.

52249991 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 58320, while the sum is 41.

The square root of 52249991 is about 7228.4155248574. The cubic root of 52249991 is about 373.8482970203.

The spelling of 52249991 in words is "fifty-two million, two hundred forty-nine thousand, nine hundred ninety-one".