51012140 has 12 divisors (see below), whose sum is σ = 107125536. Its totient is φ = 20404848.

The previous prime is 51012139. The next prime is 51012173. The reversal of 51012140 is 4121015.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1275284 + ... + 1275323.

It is an arithmetic number, because the mean of its divisors is an integer number (8927128).

Almost surely, 2^51012140 is an apocalyptic number.

It is an amenable number.

51012140 is an abundant number, since it is smaller than the sum of its proper divisors (56113396).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

51012140 is a wasteful number, since it uses less digits than its factorization.

51012140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2550616 (or 2550614 counting only the distinct ones).

The product of its (nonzero) digits is 40, while the sum is 14.

The square root of 51012140 is about 7142.2783479783. The cubic root of 51012140 is about 370.8723996493.

Adding to 51012140 its reverse (4121015), we get a palindrome (55133155).

The spelling of 51012140 in words is "fifty-one million, twelve thousand, one hundred forty".