51009738 has 32 divisors (see below), whose sum is σ = 110267136. Its totient is φ = 15638208.

The previous prime is 51009731. The next prime is 51009769. The reversal of 51009738 is 83790015.

It is a junction number, because it is equal to n+sod(n) for n = 51009699 and 51009708.

It is not an unprimeable number, because it can be changed into a prime (51009731) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 23695 + ... + 25757.

It is an arithmetic number, because the mean of its divisors is an integer number (3445848).

Almost surely, 2^51009738 is an apocalyptic number.

51009738 is an abundant number, since it is smaller than the sum of its proper divisors (59257398).

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

51009738 is a wasteful number, since it uses less digits than its factorization.

51009738 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2398.

The product of its (nonzero) digits is 7560, while the sum is 33.

The square root of 51009738 is about 7142.1101923731. The cubic root of 51009738 is about 370.8665784893.

The spelling of 51009738 in words is "fifty-one million, nine thousand, seven hundred thirty-eight".