51123117 has 8 divisors (see below), whose sum is σ = 68203296. Its totient is φ = 34062512.

The previous prime is 51123109. The next prime is 51123119. The reversal of 51123117 is 71132115.

It is a happy number.

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 51123117 - 2³ = 51123109 is a prime.

It is a super-2 number, since 2×51123117² = 5227146183591378, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 51123093 and 51123102.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51123119) 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, 3043 + ... + 10559.

It is an arithmetic number, because the mean of its divisors is an integer number (8525412).

Almost surely, 2^51123117 is an apocalyptic number.

It is an amenable number.

51123117 is a deficient number, since it is larger than the sum of its proper divisors (17080179).

51123117 is a wasteful number, since it uses less digits than its factorization.

51123117 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9787.

The product of its digits is 210, while the sum is 21.

The square root of 51123117 is about 7150.0431467230. The cubic root of 51123117 is about 371.1411493734.

The spelling of 51123117 in words is "fifty-one million, one hundred twenty-three thousand, one hundred seventeen".