53444643 has 12 divisors (see below), whose sum is σ = 82893960. Its totient is φ = 30539712.

The previous prime is 53444639. The next prime is 53444647. The reversal of 53444643 is 34644435.

It is an interprime number because it is at equal distance from previous prime (53444639) and next prime (53444647).

It is not a de Polignac number, because 53444643 - 2² = 53444639 is a prime.

It is not an unprimeable number, because it can be changed into a prime (53444647) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 181638 + ... + 181931.

It is an arithmetic number, because the mean of its divisors is an integer number (6907830).

Almost surely, 2^53444643 is an apocalyptic number.

53444643 is a deficient number, since it is larger than the sum of its proper divisors (29449317).

53444643 is a wasteful number, since it uses less digits than its factorization.

53444643 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 363586 (or 363579 counting only the distinct ones).

The product of its digits is 69120, while the sum is 33.

The square root of 53444643 is about 7310.5843131722. The cubic root of 53444643 is about 376.6760956037.

The spelling of 53444643 in words is "fifty-three million, four hundred forty-four thousand, six hundred forty-three".