51842807 has 4 divisors (see below), whose sum is σ = 53630520. Its totient is φ = 50055096.

The previous prime is 51842801. The next prime is 51842837. The reversal of 51842807 is 70824815.

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 51842807 - 2¹⁸ = 51580663 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51842801) 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, 893813 + ... + 893870.

It is an arithmetic number, because the mean of its divisors is an integer number (13407630).

Almost surely, 2^51842807 is an apocalyptic number.

51842807 is a deficient number, since it is larger than the sum of its proper divisors (1787713).

51842807 is a wasteful number, since it uses less digits than its factorization.

51842807 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1787712.

The product of its (nonzero) digits is 17920, while the sum is 35.

The square root of 51842807 is about 7200.1949279169. The cubic root of 51842807 is about 372.8746305325.

The spelling of 51842807 in words is "fifty-one million, eight hundred forty-two thousand, eight hundred seven".