51268921 has 8 divisors (see below), whose sum is σ = 56102688. Its totient is φ = 46464000.

The previous prime is 51268907. The next prime is 51268933. The reversal of 51268921 is 12986215.

51268921 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 not a de Polignac number, because 51268921 - 2¹⁵ = 51236153 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (51268961) 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, 3400 + ... + 10681.

It is an arithmetic number, because the mean of its divisors is an integer number (7012836).

Almost surely, 2^51268921 is an apocalyptic number.

It is an amenable number.

51268921 is a deficient number, since it is larger than the sum of its proper divisors (4833767).

51268921 is a wasteful number, since it uses less digits than its factorization.

51268921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14423.

The product of its digits is 8640, while the sum is 34.

The square root of 51268921 is about 7160.2319096521. The cubic root of 51268921 is about 371.4936481002.

It can be divided in two parts, 512 and 68921, that multiplied together give a cube (35287552 = 328³).

The spelling of 51268921 in words is "fifty-one million, two hundred sixty-eight thousand, nine hundred twenty-one".