51240300 has 36 divisors (see below), whose sum is σ = 148256136. Its totient is φ = 13664000.

The previous prime is 51240253. The next prime is 51240307. The reversal of 51240300 is 304215.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a self number, because there is not a number n which added to its sum of digits gives 51240300.

It is not an unprimeable number, because it can be changed into a prime (51240307) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 85101 + ... + 85700.

It is an arithmetic number, because the mean of its divisors is an integer number (4118226).

Almost surely, 2^51240300 is an apocalyptic number.

51240300 is a gapful number since it is divisible by the number (50) formed by its first and last digit.

It is an amenable number.

51240300 is an abundant number, since it is smaller than the sum of its proper divisors (97015836).

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

51240300 is a wasteful number, since it uses less digits than its factorization.

51240300 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 170818 (or 170811 counting only the distinct ones).

The product of its (nonzero) digits is 120, while the sum is 15.

The square root of 51240300 is about 7158.2330221920. The cubic root of 51240300 is about 371.4245061544.

Adding to 51240300 its reverse (304215), we get a palindrome (51544515).

The spelling of 51240300 in words is "fifty-one million, two hundred forty thousand, three hundred".