51330012 has 12 divisors (see below), whose sum is σ = 119770056. Its totient is φ = 17110000.

The previous prime is 51330007. The next prime is 51330031. The reversal of 51330012 is 21003315.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (12).

It is a junction number, because it is equal to n+sod(n) for n = 51329973 and 51330000.

It is a congruent number.

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, 2138739 + ... + 2138762.

It is an arithmetic number, because the mean of its divisors is an integer number (9980838).

Almost surely, 2^51330012 is an apocalyptic number.

It is an amenable number.

51330012 is an abundant number, since it is smaller than the sum of its proper divisors (68440044).

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

51330012 is a wasteful number, since it uses less digits than its factorization.

51330012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4277508 (or 4277506 counting only the distinct ones).

The product of its (nonzero) digits is 90, while the sum is 15.

The square root of 51330012 is about 7164.4966327021. The cubic root of 51330012 is about 371.6411442811.

Adding to 51330012 its reverse (21003315), we get a palindrome (72333327).

The spelling of 51330012 in words is "fifty-one million, three hundred thirty thousand, twelve".