51204630 has 16 divisors (see below), whose sum is σ = 122891184. Its totient is φ = 13654560.

The previous prime is 51204619. The next prime is 51204631. The reversal of 51204630 is 3640215.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 51204597 and 51204606.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51204631) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 853381 + ... + 853440.

It is an arithmetic number, because the mean of its divisors is an integer number (7680699).

Almost surely, 2^51204630 is an apocalyptic number.

51204630 is an abundant number, since it is smaller than the sum of its proper divisors (71686554).

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

51204630 is a wasteful number, since it uses less digits than its factorization.

51204630 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1706831.

The product of its (nonzero) digits is 720, while the sum is 21.

The square root of 51204630 is about 7155.7410517709. The cubic root of 51204630 is about 371.3382993497.

Adding to 51204630 its reverse (3640215), we get a palindrome (54844845).

The spelling of 51204630 in words is "fifty-one million, two hundred four thousand, six hundred thirty".