51330204 has 72 divisors (see below), whose sum is σ = 138378240. Its totient is φ = 16005792.

The previous prime is 51330199. The next prime is 51330247. The reversal of 51330204 is 40203315.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 38257 + ... + 39575.

It is an arithmetic number, because the mean of its divisors is an integer number (1921920).

Almost surely, 2^51330204 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 51330204, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (69189120).

51330204 is an abundant number, since it is smaller than the sum of its proper divisors (87048036).

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

51330204 is a wasteful number, since it uses less digits than its factorization.

51330204 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1399 (or 1394 counting only the distinct ones).

The product of its (nonzero) digits is 360, while the sum is 18.

The square root of 51330204 is about 7164.5100320957. The cubic root of 51330204 is about 371.6416076553.

Adding to 51330204 its reverse (40203315), we get a palindrome (91533519).

The spelling of 51330204 in words is "fifty-one million, three hundred thirty thousand, two hundred four".