51386330 has 8 divisors (see below), whose sum is σ = 92495412. Its totient is φ = 20554528.

The previous prime is 51386327. The next prime is 51386341. The reversal of 51386330 is 3368315.

It can be written as a sum of positive squares in 2 ways, for example, as 49801249 + 1585081 = 7057^2 + 1259^2 .

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

It is a junction number, because it is equal to n+sod(n) for n = 51386293 and 51386302.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2569307 + ... + 2569326.

Almost surely, 2^51386330 is an apocalyptic number.

51386330 is a deficient number, since it is larger than the sum of its proper divisors (41109082).

51386330 is a wasteful number, since it uses less digits than its factorization.

51386330 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5138640.

The product of its (nonzero) digits is 6480, while the sum is 29.

The square root of 51386330 is about 7168.4259081056. The cubic root of 51386330 is about 371.7770130459. Note that the first 3 decimals are identical.

The spelling of 51386330 in words is "fifty-one million, three hundred eighty-six thousand, three hundred thirty".