51904742 has 16 divisors (see below), whose sum is σ = 79084080. Its totient is φ = 25546752.

The previous prime is 51904739. The next prime is 51904753. The reversal of 51904742 is 24740915.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 51904699 and 51904708.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 36134 + ... + 37542.

It is an arithmetic number, because the mean of its divisors is an integer number (4942755).

Almost surely, 2^51904742 is an apocalyptic number.

51904742 is a deficient number, since it is larger than the sum of its proper divisors (27179338).

51904742 is a wasteful number, since it uses less digits than its factorization.

51904742 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1687.

The product of its (nonzero) digits is 10080, while the sum is 32.

The square root of 51904742 is about 7204.4945693643. The cubic root of 51904742 is about 373.0230587081.

The spelling of 51904742 in words is "fifty-one million, nine hundred four thousand, seven hundred forty-two".