51921626 has 8 divisors (see below), whose sum is σ = 81268704. Its totient is φ = 24832060.

The previous prime is 51921599. The next prime is 51921647. The reversal of 51921626 is 62612915.

It is a happy number.

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

It is a junction number, because it is equal to n+sod(n) for n = 51921592 and 51921601.

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 3 ways as a sum of consecutive naturals, for example, 564320 + ... + 564411.

It is an arithmetic number, because the mean of its divisors is an integer number (10158588).

Almost surely, 2^51921626 is an apocalyptic number.

51921626 is a deficient number, since it is larger than the sum of its proper divisors (29347078).

51921626 is a wasteful number, since it uses less digits than its factorization.

51921626 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1128756.

The product of its digits is 6480, while the sum is 32.

The square root of 51921626 is about 7205.6662426177. Note that the first 3 decimals coincide. The cubic root of 51921626 is about 373.0635009895.

The spelling of 51921626 in words is "fifty-one million, nine hundred twenty-one thousand, six hundred twenty-six".