51405046 has 48 divisors (see below), whose sum is σ = 100654848. Its totient is φ = 19126800.

The previous prime is 51405017. The next prime is 51405049. The reversal of 51405046 is 64050415.

It is a self number, because there is not a number n which added to its sum of digits gives 51405046.

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 23 ways as a sum of consecutive naturals, for example, 81151 + ... + 81781.

It is an arithmetic number, because the mean of its divisors is an integer number (2096976).

Almost surely, 2^51405046 is an apocalyptic number.

51405046 is a deficient number, since it is larger than the sum of its proper divisors (49249802).

51405046 is a wasteful number, since it uses less digits than its factorization.

51405046 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 697 (or 674 counting only the distinct ones).

The product of its (nonzero) digits is 2400, while the sum is 25.

The square root of 51405046 is about 7169.7312362459. The cubic root of 51405046 is about 371.8221439459.

The spelling of 51405046 in words is "fifty-one million, four hundred five thousand, forty-six".