51378347 has 8 divisors (see below), whose sum is σ = 52265616. Its totient is φ = 50494752.

The previous prime is 51378323. The next prime is 51378391. The reversal of 51378347 is 74387315.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 51378347 - 2²² = 47184043 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 51378347.

It is not an unprimeable number, because it can be changed into a prime (51378307) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 50213 + ... + 51225.

It is an arithmetic number, because the mean of its divisors is an integer number (6533202).

Almost surely, 2^51378347 is an apocalyptic number.

51378347 is a deficient number, since it is larger than the sum of its proper divisors (887269).

51378347 is a wasteful number, since it uses less digits than its factorization.

51378347 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1837.

The product of its digits is 70560, while the sum is 38.

The square root of 51378347 is about 7167.8690696748. The cubic root of 51378347 is about 371.7577598735.

The spelling of 51378347 in words is "fifty-one million, three hundred seventy-eight thousand, three hundred forty-seven".