51950821 has 8 divisors (see below), whose sum is σ = 56080640. Its totient is φ = 47840112.

The previous prime is 51950819. The next prime is 51950863. The reversal of 51950821 is 12805915.

51950821 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 51950821 - 2¹ = 51950819 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51950881) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 1156 + ... + 10258.

It is an arithmetic number, because the mean of its divisors is an integer number (7010080).

Almost surely, 2^51950821 is an apocalyptic number.

It is an amenable number.

51950821 is a deficient number, since it is larger than the sum of its proper divisors (4129819).

51950821 is a wasteful number, since it uses less digits than its factorization.

51950821 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9555.

The product of its (nonzero) digits is 3600, while the sum is 31.

The square root of 51950821 is about 7207.6917941877. The cubic root of 51950821 is about 373.1334111534.

The spelling of 51950821 in words is "fifty-one million, nine hundred fifty thousand, eight hundred twenty-one".