51615066 has 8 divisors (see below), whose sum is σ = 103230144. Its totient is φ = 17205020.

The previous prime is 51615061. The next prime is 51615101. The reversal of 51615066 is 66051615.

51615066 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

51615066 is an admirable number.

It is not an unprimeable number, because it can be changed into a prime (51615061) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4301250 + ... + 4301261.

It is an arithmetic number, because the mean of its divisors is an integer number (12903768).

Almost surely, 2^51615066 is an apocalyptic number.

51615066 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

51615066 is a wasteful number, since it uses less digits than its factorization.

51615066 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8602516.

The product of its (nonzero) digits is 5400, while the sum is 30.

The square root of 51615066 is about 7184.3626022077. The cubic root of 51615066 is about 372.3278269830.

The spelling of 51615066 in words is "fifty-one million, six hundred fifteen thousand, sixty-six".