51245843 has 4 divisors (see below), whose sum is σ = 55904568. Its totient is φ = 46587120.

The previous prime is 51245827. The next prime is 51245861. The reversal of 51245843 is 34854215.

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

It is a cyclic number.

It is not a de Polignac number, because 51245843 - 2⁴ = 51245827 is a prime.

It is a super-2 number, since 2×51245843² = 5252272849561298, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (51245893) 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, 2329346 + ... + 2329367.

It is an arithmetic number, because the mean of its divisors is an integer number (13976142).

Almost surely, 2^51245843 is an apocalyptic number.

51245843 is a deficient number, since it is larger than the sum of its proper divisors (4658725).

51245843 is a wasteful number, since it uses less digits than its factorization.

51245843 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4658724.

The product of its digits is 19200, while the sum is 32.

The square root of 51245843 is about 7158.6201882765. The cubic root of 51245843 is about 371.4378988148.

The spelling of 51245843 in words is "fifty-one million, two hundred forty-five thousand, eight hundred forty-three".