51306466 has 4 divisors (see below), whose sum is σ = 76959702. Its totient is φ = 25653232.

The previous prime is 51306449. The next prime is 51306467. The reversal of 51306466 is 66460315.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 45279441 + 6027025 = 6729^2 + 2455^2 .

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (51306467) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12826615 + ... + 12826618.

Almost surely, 2^51306466 is an apocalyptic number.

51306466 is a deficient number, since it is larger than the sum of its proper divisors (25653236).

51306466 is a wasteful number, since it uses less digits than its factorization.

51306466 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25653235.

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

The square root of 51306466 is about 7162.8532024606. The cubic root of 51306466 is about 371.5843094301.

The spelling of 51306466 in words is "fifty-one million, three hundred six thousand, four hundred sixty-six".