51909166 has 8 divisors (see below), whose sum is σ = 77914440. Its totient is φ = 25937688.

The previous prime is 51909131. The next prime is 51909167. The reversal of 51909166 is 66190915.

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

It is a congruent 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 3 ways as a sum of consecutive naturals, for example, 4176 + ... + 11011.

It is an arithmetic number, because the mean of its divisors is an integer number (9739305).

Almost surely, 2^51909166 is an apocalyptic number.

51909166 is a deficient number, since it is larger than the sum of its proper divisors (26005274).

51909166 is a wasteful number, since it uses less digits than its factorization.

51909166 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16898.

The product of its (nonzero) digits is 14580, while the sum is 37.

The square root of 51909166 is about 7204.8015933820. The cubic root of 51909166 is about 373.0336563727.

The spelling of 51909166 in words is "fifty-one million, nine hundred nine thousand, one hundred sixty-six".