51107997 has 8 divisors (see below), whose sum is σ = 68965344. Its totient is φ = 33661328.

The previous prime is 51107993. The next prime is 51108007. The reversal of 51107997 is 79970115.

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 51107997 - 2² = 51107993 is a prime.

It is a super-2 number, since 2×51107997² = 5224054714704018, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51107993) 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, 102378 + ... + 102875.

It is an arithmetic number, because the mean of its divisors is an integer number (8620668).

Almost surely, 2^51107997 is an apocalyptic number.

It is an amenable number.

51107997 is a deficient number, since it is larger than the sum of its proper divisors (17857347).

51107997 is a wasteful number, since it uses less digits than its factorization.

51107997 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 205339.

The product of its (nonzero) digits is 19845, while the sum is 39.

The square root of 51107997 is about 7148.9857322560. The cubic root of 51107997 is about 371.1045566158.

The spelling of 51107997 in words is "fifty-one million, one hundred seven thousand, nine hundred ninety-seven".