51943845 has 16 divisors (see below), whose sum is σ = 83338560. Its totient is φ = 27627264.

The previous prime is 51943811. The next prime is 51943861. The reversal of 51943845 is 54834915.

It is not a de Polignac number, because 51943845 - 2⁸ = 51943589 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1117 + ... + 10253.

It is an arithmetic number, because the mean of its divisors is an integer number (5208660).

Almost surely, 2^51943845 is an apocalyptic number.

It is an amenable number.

51943845 is a deficient number, since it is larger than the sum of its proper divisors (31394715).

51943845 is a wasteful number, since it uses less digits than its factorization.

51943845 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9524.

The product of its digits is 86400, while the sum is 39.

The square root of 51943845 is about 7207.2078504786. The cubic root of 51943845 is about 373.1167088495.

The spelling of 51943845 in words is "fifty-one million, nine hundred forty-three thousand, eight hundred forty-five".