51009238 has 8 divisors (see below), whose sum is σ = 87444432. Its totient is φ = 21861096.

The previous prime is 51009221. The next prime is 51009251. The reversal of 51009238 is 83290015.

51009238 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 super-2 number, since 2×51009238² = 5203884722681288, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 1821745 + ... + 1821772.

It is an arithmetic number, because the mean of its divisors is an integer number (10930554).

Almost surely, 2^51009238 is an apocalyptic number.

51009238 is a deficient number, since it is larger than the sum of its proper divisors (36435194).

51009238 is a wasteful number, since it uses less digits than its factorization.

51009238 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3643526.

The product of its (nonzero) digits is 2160, while the sum is 28.

The square root of 51009238 is about 7142.0751886269. The cubic root of 51009238 is about 370.8653667344.

The spelling of 51009238 in words is "fifty-one million, nine thousand, two hundred thirty-eight".