51909163 has 8 divisors (see below), whose sum is σ = 52458768. Its totient is φ = 51362304.

The previous prime is 51909131. The next prime is 51909167. The reversal of 51909163 is 36190915.

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 51909163 - 2⁵ = 51909131 is a prime.

It is a super-2 number, since 2×51909163² = 5389122406721138, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (51909167) 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, 76795 + ... + 77467.

It is an arithmetic number, because the mean of its divisors is an integer number (6557346).

Almost surely, 2^51909163 is an apocalyptic number.

51909163 is a deficient number, since it is larger than the sum of its proper divisors (549605).

51909163 is a wasteful number, since it uses less digits than its factorization.

51909163 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1373.

The product of its (nonzero) digits is 7290, while the sum is 34.

The square root of 51909163 is about 7204.8013851875. The cubic root of 51909163 is about 373.0336491864.

The spelling of 51909163 in words is "fifty-one million, nine hundred nine thousand, one hundred sixty-three".