51030530 has 16 divisors (see below), whose sum is σ = 92699640. Its totient is φ = 20224512.

The previous prime is 51030509. The next prime is 51030533. The reversal of 51030530 is 3503015.

It can be written as a sum of positive squares in 4 ways, for example, as 48344209 + 2686321 = 6953^2 + 1639^2 .

It is a super-2 number, since 2×51030530² = 5208229984161800, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 51030499 and 51030508.

It is not an unprimeable number, because it can be changed into a prime (51030533) 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, 22319 + ... + 24498.

Almost surely, 2^51030530 is an apocalyptic number.

51030530 is a deficient number, since it is larger than the sum of its proper divisors (41669110).

51030530 is a wasteful number, since it uses less digits than its factorization.

51030530 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 46933.

The product of its (nonzero) digits is 225, while the sum is 17.

The square root of 51030530 is about 7143.5656362912. The cubic root of 51030530 is about 370.9169610943.

Adding to 51030530 its reverse (3503015), we get a palindrome (54533545).

The spelling of 51030530 in words is "fifty-one million, thirty thousand, five hundred thirty".