51015204 has 48 divisors (see below), whose sum is σ = 134144640. Its totient is φ = 16763040.

The previous prime is 51015191. The next prime is 51015221. The reversal of 51015204 is 40251015.

51015204 is a `hidden beast` number, since 510 + 152 + 0 + 4 = 666.

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

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 4342 + ... + 10994.

It is an arithmetic number, because the mean of its divisors is an integer number (2794680).

Almost surely, 2^51015204 is an apocalyptic number.

51015204 is a gapful number since it is divisible by the number (54) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 51015204, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (67072320).

51015204 is an abundant number, since it is smaller than the sum of its proper divisors (83129436).

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

51015204 is a wasteful number, since it uses less digits than its factorization.

51015204 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6737 (or 6729 counting only the distinct ones).

The product of its (nonzero) digits is 200, while the sum is 18.

The square root of 51015204 is about 7142.4928421385. The cubic root of 51015204 is about 370.8798248771.

Adding to 51015204 its reverse (40251015), we get a palindrome (91266219).

The spelling of 51015204 in words is "fifty-one million, fifteen thousand, two hundred four".