51030630 has 48 divisors (see below), whose sum is σ = 151635744. Its totient is φ = 11664000.

The previous prime is 51030593. The next prime is 51030631. The reversal of 51030630 is 3603015.

51030630 is a `hidden beast` number, since 5 + 1 + 0 + 30 + 630 = 666.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51030631) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 39871 + ... + 41130.

It is an arithmetic number, because the mean of its divisors is an integer number (3159078).

Almost surely, 2^51030630 is an apocalyptic number.

51030630 is an abundant number, since it is smaller than the sum of its proper divisors (100605114).

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

51030630 is a wasteful number, since it uses less digits than its factorization.

51030630 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 81021 (or 81018 counting only the distinct ones).

The product of its (nonzero) digits is 270, while the sum is 18.

The square root of 51030630 is about 7143.5726355935. The cubic root of 51030630 is about 370.9172033785.

Adding to 51030630 its reverse (3603015), we get a palindrome (54633645).

It can be divided in two parts, 51030 and 630, that multiplied together give a square (32148900 = 5670²).

The spelling of 51030630 in words is "fifty-one million, thirty thousand, six hundred thirty".