51005870 has 8 divisors (see below), whose sum is σ = 91810584. Its totient is φ = 20402344.

The previous prime is 51005863. The next prime is 51005879. The reversal of 51005870 is 7850015.

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 (51005879) 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, 2550284 + ... + 2550303.

It is an arithmetic number, because the mean of its divisors is an integer number (11476323).

Almost surely, 2^51005870 is an apocalyptic number.

51005870 is a deficient number, since it is larger than the sum of its proper divisors (40804714).

51005870 is a wasteful number, since it uses less digits than its factorization.

51005870 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5100594.

The product of its (nonzero) digits is 1400, while the sum is 26.

The square root of 51005870 is about 7141.8393989224. The cubic root of 51005870 is about 370.8572041473.

Adding to 51005870 its reverse (7850015), we get a palindrome (58855885).

The spelling of 51005870 in words is "fifty-one million, five thousand, eight hundred seventy".