51378323 has 2 divisors, whose sum is σ = 51378324. Its totient is φ = 51378322.

The previous prime is 51378319. The next prime is 51378391. The reversal of 51378323 is 32387315.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 51378323 - 2² = 51378319 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 51378323.

It is not a weakly prime, because it can be changed into another prime (51378023) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25689161 + 25689162.

It is an arithmetic number, because the mean of its divisors is an integer number (25689162).

Almost surely, 2^51378323 is an apocalyptic number.

51378323 is a deficient number, since it is larger than the sum of its proper divisors (1).

51378323 is an equidigital number, since it uses as much as digits as its factorization.

51378323 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 15120, while the sum is 32.

The square root of 51378323 is about 7167.8673955368. The cubic root of 51378323 is about 371.7577019880.

The spelling of 51378323 in words is "fifty-one million, three hundred seventy-eight thousand, three hundred twenty-three".