51917793 has 16 divisors (see below), whose sum is σ = 70808256. Its totient is φ = 33824960.

The previous prime is 51917753. The next prime is 51917809. The reversal of 51917793 is 39771915.

It is a cyclic number.

It is not a de Polignac number, because 51917793 - 2⁶ = 51917729 is a prime.

It is not an unprimeable number, because it can be changed into a prime (51917753) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 54703 + ... + 55643.

It is an arithmetic number, because the mean of its divisors is an integer number (4425516).

Almost surely, 2^51917793 is an apocalyptic number.

51917793 is a gapful number since it is divisible by the number (53) formed by its first and last digit.

It is an amenable number.

51917793 is a deficient number, since it is larger than the sum of its proper divisors (18890463).

51917793 is a wasteful number, since it uses less digits than its factorization.

51917793 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1344.

The product of its digits is 59535, while the sum is 42.

The square root of 51917793 is about 7205.4002664668. The cubic root of 51917793 is about 373.0543205658.

The spelling of 51917793 in words is "fifty-one million, nine hundred seventeen thousand, seven hundred ninety-three".