51030312 has 32 divisors (see below), whose sum is σ = 128752800. Its totient is φ = 16853184.

The previous prime is 51030283. The next prime is 51030313. The reversal of 51030312 is 21303015.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 51030291 and 51030300.

It is not an unprimeable number, because it can be changed into a prime (51030313) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7138 + ... + 12369.

It is an arithmetic number, because the mean of its divisors is an integer number (4023525).

Almost surely, 2^51030312 is an apocalyptic number.

It is an amenable number.

51030312 is an abundant number, since it is smaller than the sum of its proper divisors (77722488).

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

51030312 is a wasteful number, since it uses less digits than its factorization.

51030312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19625 (or 19621 counting only the distinct ones).

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

The square root of 51030312 is about 7143.5503777883. The cubic root of 51030312 is about 370.9164329136.

Adding to 51030312 its reverse (21303015), we get a palindrome (72333327).

The spelling of 51030312 in words is "fifty-one million, thirty thousand, three hundred twelve".