51690163 has 8 divisors (see below), whose sum is σ = 59119200. Its totient is φ = 44272320.

The previous prime is 51690097. The next prime is 51690173. The reversal of 51690163 is 36109615.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-51690163 is a prime.

It is not an unprimeable number, because it can be changed into a prime (51690173) 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, 13263 + ... + 16711.

It is an arithmetic number, because the mean of its divisors is an integer number (7389900).

Almost surely, 2^51690163 is an apocalyptic number.

51690163 is a deficient number, since it is larger than the sum of its proper divisors (7429037).

51690163 is a wasteful number, since it uses less digits than its factorization.

51690163 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5597.

The product of its (nonzero) digits is 4860, while the sum is 31.

The square root of 51690163 is about 7189.5871230551. The cubic root of 51690163 is about 372.5083114522.

Adding to 51690163 its reverse (36109615), we get a palindrome (87799778).

The spelling of 51690163 in words is "fifty-one million, six hundred ninety thousand, one hundred sixty-three".