51393793 has 8 divisors (see below), whose sum is σ = 56424960. Its totient is φ = 46422480.

The previous prime is 51393791. The next prime is 51393809. The reversal of 51393793 is 39739315.

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 51393793 - 2¹ = 51393791 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (51393791) 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, 13153 + ... + 16606.

It is an arithmetic number, because the mean of its divisors is an integer number (7053120).

Almost surely, 2^51393793 is an apocalyptic number.

It is an amenable number.

51393793 is a deficient number, since it is larger than the sum of its proper divisors (5031167).

51393793 is a wasteful number, since it uses less digits than its factorization.

51393793 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29927.

The product of its digits is 76545, while the sum is 40.

The square root of 51393793 is about 7168.9464358440. The cubic root of 51393793 is about 371.7950102936.

The spelling of 51393793 in words is "fifty-one million, three hundred ninety-three thousand, seven hundred ninety-three".