51004012 has 12 divisors (see below), whose sum is σ = 94507560. Its totient is φ = 24001856.

The previous prime is 51004003. The next prime is 51004013. The reversal of 51004012 is 21040015.

It is a super-2 number, since 2×51004012² = 5202818480192288, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 51003983 and 51004001.

It is not an unprimeable number, because it can be changed into a prime (51004013) 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, 374962 + ... + 375097.

It is an arithmetic number, because the mean of its divisors is an integer number (7875630).

Almost surely, 2^51004012 is an apocalyptic number.

It is an amenable number.

51004012 is a deficient number, since it is larger than the sum of its proper divisors (43503548).

51004012 is a wasteful number, since it uses less digits than its factorization.

51004012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 750080 (or 750078 counting only the distinct ones).

The product of its (nonzero) digits is 40, while the sum is 13.

The square root of 51004012 is about 7141.7093192036. The cubic root of 51004012 is about 370.8527009986.

Adding to 51004012 its reverse (21040015), we get a palindrome (72044027).

The spelling of 51004012 in words is "fifty-one million, four thousand, twelve".