51665030 has 16 divisors (see below), whose sum is σ = 93305520. Its totient is φ = 20597472.

The previous prime is 51665021. The next prime is 51665039. The reversal of 51665030 is 3056615.

It is an interprime number because it is at equal distance from previous prime (51665021) and next prime (51665039).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51665039) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5345 + ... + 11484.

It is an arithmetic number, because the mean of its divisors is an integer number (5831595).

Almost surely, 2^51665030 is an apocalyptic number.

51665030 is a deficient number, since it is larger than the sum of its proper divisors (41640490).

51665030 is a wasteful number, since it uses less digits than its factorization.

51665030 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17143.

The product of its (nonzero) digits is 2700, while the sum is 26.

The square root of 51665030 is about 7187.8390354821. The cubic root of 51665030 is about 372.4479274987.

The spelling of 51665030 in words is "fifty-one million, six hundred sixty-five thousand, thirty".