51943259 has 4 divisors (see below), whose sum is σ = 53618880. Its totient is φ = 50267640.

The previous prime is 51943253. The next prime is 51943261. The reversal of 51943259 is 95234915.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-51943259 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (51943253) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 837764 + ... + 837825.

It is an arithmetic number, because the mean of its divisors is an integer number (13404720).

Almost surely, 2^51943259 is an apocalyptic number.

51943259 is a deficient number, since it is larger than the sum of its proper divisors (1675621).

51943259 is a wasteful number, since it uses less digits than its factorization.

51943259 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1675620.

The product of its digits is 48600, while the sum is 38.

The square root of 51943259 is about 7207.1671966175. The cubic root of 51943259 is about 373.1153057496.

The spelling of 51943259 in words is "fifty-one million, nine hundred forty-three thousand, two hundred fifty-nine".