51430666 has 32 divisors (see below), whose sum is σ = 92695680. Its totient is φ = 20938176.

The previous prime is 51430657. The next prime is 51430667. The reversal of 51430666 is 66603415.

It is a super-2 number, since 2×51430666² = 5290226810407112, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (51430667) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 21120 + ... + 23428.

It is an arithmetic number, because the mean of its divisors is an integer number (2896740).

Almost surely, 2^51430666 is an apocalyptic number.

51430666 is a deficient number, since it is larger than the sum of its proper divisors (41265014).

51430666 is a wasteful number, since it uses less digits than its factorization.

51430666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2398.

The product of its (nonzero) digits is 12960, while the sum is 31.

The square root of 51430666 is about 7171.5176915350. The cubic root of 51430666 is about 371.8839050759.

The spelling of 51430666 in words is "fifty-one million, four hundred thirty thousand, six hundred sixty-six".