52440991 has 2 divisors, whose sum is σ = 52440992. Its totient is φ = 52440990.

The previous prime is 52440923. The next prime is 52441027. The reversal of 52440991 is 19904425.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 52440991 - 2⁷ = 52440863 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (52440901) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 26220495 + 26220496.

It is an arithmetic number, because the mean of its divisors is an integer number (26220496).

Almost surely, 2^52440991 is an apocalyptic number.

52440991 is a deficient number, since it is larger than the sum of its proper divisors (1).

52440991 is an equidigital number, since it uses as much as digits as its factorization.

52440991 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 12960, while the sum is 34.

The square root of 52440991 is about 7241.6152203773. The cubic root of 52440991 is about 374.3032776020.

It can be divided in two parts, 5244099 and 1, that added together give a square (5244100 = 2290²).

The spelling of 52440991 in words is "fifty-two million, four hundred forty thousand, nine hundred ninety-one".