51972830 has 96 divisors (see below), whose sum is σ = 120657600. Its totient is φ = 15966720.

The previous prime is 51972821. The next prime is 51972889. The reversal of 51972830 is 3827915.

51972830 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (35).

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 261071 + ... + 261269.

It is an arithmetic number, because the mean of its divisors is an integer number (1256850).

Almost surely, 2^51972830 is an apocalyptic number.

51972830 is an abundant number, since it is smaller than the sum of its proper divisors (68684770).

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

51972830 is a wasteful number, since it uses less digits than its factorization.

51972830 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 274 (or 267 counting only the distinct ones).

The product of its (nonzero) digits is 15120, while the sum is 35.

The square root of 51972830 is about 7209.2184042377. The cubic root of 51972830 is about 373.1860964536.

The spelling of 51972830 in words is "fifty-one million, nine hundred seventy-two thousand, eight hundred thirty".