51481345 has 8 divisors (see below), whose sum is σ = 61819776. Its totient is φ = 41156976.

The previous prime is 51481343. The next prime is 51481361. The reversal of 51481345 is 54318415.

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 51481345 - 2¹ = 51481343 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (51481343) 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, 7944 + ... + 12886.

It is an arithmetic number, because the mean of its divisors is an integer number (7727472).

Almost surely, 2^51481345 is an apocalyptic number.

It is an amenable number.

51481345 is a deficient number, since it is larger than the sum of its proper divisors (10338431).

51481345 is a wasteful number, since it uses less digits than its factorization.

51481345 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7031.

The product of its digits is 9600, while the sum is 31.

The square root of 51481345 is about 7175.0501740406. The cubic root of 51481345 is about 372.0060145673.

The spelling of 51481345 in words is "fifty-one million, four hundred eighty-one thousand, three hundred forty-five".