51228930 has 16 divisors (see below), whose sum is σ = 122949504. Its totient is φ = 13661040.

The previous prime is 51228929. The next prime is 51228977. The reversal of 51228930 is 3982215.

It is a happy number.

It is a super-3 number, since 3×51228930³ (a number of 24 digits) contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (30), and also a Moran number because the ratio is a prime number: 1707631 = 51228930 / (5 + 1 + 2 + 2 + 8 + 9 + 3 + 0).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 853786 + ... + 853845.

It is an arithmetic number, because the mean of its divisors is an integer number (7684344).

Almost surely, 2^51228930 is an apocalyptic number.

51228930 is an abundant number, since it is smaller than the sum of its proper divisors (71720574).

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

51228930 is a wasteful number, since it uses less digits than its factorization.

51228930 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1707641.

The product of its (nonzero) digits is 4320, while the sum is 30.

The square root of 51228930 is about 7157.4387877229. The cubic root of 51228930 is about 371.3970316273.

The spelling of 51228930 in words is "fifty-one million, two hundred twenty-eight thousand, nine hundred thirty".