51405045 has 16 divisors (see below), whose sum is σ = 82338432. Its totient is φ = 27385920.

The previous prime is 51405017. The next prime is 51405049. The reversal of 51405045 is 54050415.

It is not a de Polignac number, because 51405045 - 2⁷ = 51404917 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51405049) 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, 22035 + ... + 24255.

It is an arithmetic number, because the mean of its divisors is an integer number (5146152).

Almost surely, 2^51405045 is an apocalyptic number.

It is an amenable number.

51405045 is a deficient number, since it is larger than the sum of its proper divisors (30933387).

51405045 is a wasteful number, since it uses less digits than its factorization.

51405045 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3772.

The product of its (nonzero) digits is 2000, while the sum is 24.

The square root of 51405045 is about 7169.7311665083. The cubic root of 51405045 is about 371.8221415349.

The spelling of 51405045 in words is "fifty-one million, four hundred five thousand, forty-five".