51020306 has 8 divisors (see below), whose sum is σ = 76565820. Its totient is φ = 25498368.

The previous prime is 51020303. The next prime is 51020323. The reversal of 51020306 is 60302015.

It can be written as a sum of positive squares in 2 ways, for example, as 48874081 + 2146225 = 6991^2 + 1465^2 .

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

It is not an unprimeable number, because it can be changed into a prime (51020303) 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, 1250 + ... + 10178.

Almost surely, 2^51020306 is an apocalyptic number.

51020306 is a deficient number, since it is larger than the sum of its proper divisors (25545514).

51020306 is a wasteful number, since it uses less digits than its factorization.

51020306 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11788.

The product of its (nonzero) digits is 180, while the sum is 17.

The square root of 51020306 is about 7142.8499914250. The cubic root of 51020306 is about 370.8921882880.

The spelling of 51020306 in words is "fifty-one million, twenty thousand, three hundred six".