51000046 has 4 divisors (see below), whose sum is σ = 76500072. Its totient is φ = 25500022.

The previous prime is 51000041. The next prime is 51000049. The reversal of 51000046 is 64000015.

51000046 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is a junction number, because it is equal to n+sod(n) for n = 50999993 and 51000029.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51000041) 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 as a sum of consecutive naturals, namely, 12750010 + ... + 12750013.

It is an arithmetic number, because the mean of its divisors is an integer number (19125018).

Almost surely, 2^51000046 is an apocalyptic number.

51000046 is a deficient number, since it is larger than the sum of its proper divisors (25500026).

51000046 is a wasteful number, since it uses less digits than its factorization.

51000046 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25500025.

The product of its (nonzero) digits is 120, while the sum is 16.

The square root of 51000046 is about 7141.4316491863. The cubic root of 51000046 is about 370.8430884219.

The spelling of 51000046 in words is "fifty-one million, forty-six", and thus it is an aban number and an uban number.