51000045 has 16 divisors (see below), whose sum is σ = 83140992. Its totient is φ = 26686400.

The previous prime is 51000041. The next prime is 51000049. The reversal of 51000045 is 54000015.

51000045 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (51000041) and next prime (51000049).

It is not a de Polignac number, because 51000045 - 2² = 51000041 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a junction number, because it is equal to n+sod(n) for n = 50999988 and 51000033.

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 in 15 ways as a sum of consecutive naturals, for example, 31281 + ... + 32870.

It is an arithmetic number, because the mean of its divisors is an integer number (5196312).

Almost surely, 2^51000045 is an apocalyptic number.

It is an amenable number.

51000045 is a deficient number, since it is larger than the sum of its proper divisors (32140947).

51000045 is a wasteful number, since it uses less digits than its factorization.

51000045 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 64212.

The product of its (nonzero) digits is 100, while the sum is 15.

The square root of 51000045 is about 7141.4315791723. The cubic root of 51000045 is about 370.8430859981.

The spelling of 51000045 in words is "fifty-one million, forty-five", and thus it is an aban number and an uban number.