51204530 has 32 divisors (see below), whose sum is σ = 99658944. Its totient is φ = 18830016.

The previous prime is 51204511. The next prime is 51204533. The reversal of 51204530 is 3540215.

It is not an unprimeable number, because it can be changed into a prime (51204533) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 39269 + ... + 40551.

It is an arithmetic number, because the mean of its divisors is an integer number (3114342).

Almost surely, 2^51204530 is an apocalyptic number.

51204530 is a deficient number, since it is larger than the sum of its proper divisors (48454414).

51204530 is a wasteful number, since it uses less digits than its factorization.

51204530 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1610.

The product of its (nonzero) digits is 600, while the sum is 20.

The square root of 51204530 is about 7155.7340643710. The cubic root of 51204530 is about 371.3380576147.

Adding to 51204530 its reverse (3540215), we get a palindrome (54744745).

The spelling of 51204530 in words is "fifty-one million, two hundred four thousand, five hundred thirty".