51389030 has 32 divisors (see below), whose sum is σ = 115326720. Its totient is φ = 16017120.

The previous prime is 51389027. The next prime is 51389033. The reversal of 51389030 is 3098315.

It is an interprime number because it is at equal distance from previous prime (51389027) and next prime (51389033).

It is a junction number, because it is equal to n+sod(n) for n = 51388984 and 51389002.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51389033) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 32600 + ... + 34139.

It is an arithmetic number, because the mean of its divisors is an integer number (3603960).

Almost surely, 2^51389030 is an apocalyptic number.

51389030 is an abundant number, since it is smaller than the sum of its proper divisors (63937690).

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

51389030 is a wasteful number, since it uses less digits than its factorization.

51389030 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 66764.

The product of its (nonzero) digits is 3240, while the sum is 29.

The square root of 51389030 is about 7168.6142314955. The cubic root of 51389030 is about 371.7835243778.

The spelling of 51389030 in words is "fifty-one million, three hundred eighty-nine thousand, thirty".