51745399 has 8 divisors (see below), whose sum is σ = 55070928. Its totient is φ = 48451200.

The previous prime is 51745387. The next prime is 51745427. The reversal of 51745399 is 99354715.

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 51745399 - 2⁹ = 51744887 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51745349) 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, 4377 + ... + 11074.

It is an arithmetic number, because the mean of its divisors is an integer number (6883866).

Almost surely, 2^51745399 is an apocalyptic number.

51745399 is a deficient number, since it is larger than the sum of its proper divisors (3325529).

51745399 is a wasteful number, since it uses less digits than its factorization.

51745399 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15665.

The product of its digits is 170100, while the sum is 43.

The square root of 51745399 is about 7193.4274862544. The cubic root of 51745399 is about 372.6409514178.

The spelling of 51745399 in words is "fifty-one million, seven hundred forty-five thousand, three hundred ninety-nine".