51039806 has 8 divisors (see below), whose sum is σ = 79888464. Its totient is φ = 24410320.

The previous prime is 51039803. The next prime is 51039811. The reversal of 51039806 is 60893015.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51039803) 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, 554735 + ... + 554826.

It is an arithmetic number, because the mean of its divisors is an integer number (9986058).

Almost surely, 2^51039806 is an apocalyptic number.

51039806 is a deficient number, since it is larger than the sum of its proper divisors (28848658).

51039806 is a wasteful number, since it uses less digits than its factorization.

51039806 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1109586.

The product of its (nonzero) digits is 6480, while the sum is 32.

The square root of 51039806 is about 7144.2148623904. The cubic root of 51039806 is about 370.9394340288.

The spelling of 51039806 in words is "fifty-one million, thirty-nine thousand, eight hundred six".