51346815 has 32 divisors (see below), whose sum is σ = 89994240. Its totient is φ = 24844416.

The previous prime is 51346727. The next prime is 51346829. The reversal of 51346815 is 51864315.

It is not a de Polignac number, because 51346815 - 2¹¹ = 51344767 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 9274 + ... + 13736.

It is an arithmetic number, because the mean of its divisors is an integer number (2812320).

Almost surely, 2^51346815 is an apocalyptic number.

51346815 is a deficient number, since it is larger than the sum of its proper divisors (38647425).

51346815 is a wasteful number, since it uses less digits than its factorization.

51346815 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4543.

The product of its digits is 14400, while the sum is 33.

The square root of 51346815 is about 7165.6691941507. The cubic root of 51346815 is about 371.6816923908.

The spelling of 51346815 in words is "fifty-one million, three hundred forty-six thousand, eight hundred fifteen".