51130220 has 24 divisors (see below), whose sum is σ = 113690304. Its totient is φ = 19248896.

The previous prime is 51130207. The next prime is 51130231. The reversal of 51130220 is 2203115.

It is a happy number.

51130220 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×51130220² = 5228598794496800, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 51130195 and 51130204.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 74852 + ... + 75531.

It is an arithmetic number, because the mean of its divisors is an integer number (4737096).

Almost surely, 2^51130220 is an apocalyptic number.

It is an amenable number.

51130220 is an abundant number, since it is smaller than the sum of its proper divisors (62560084).

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

51130220 is a wasteful number, since it uses less digits than its factorization.

51130220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 150409 (or 150407 counting only the distinct ones).

The product of its (nonzero) digits is 60, while the sum is 14.

The square root of 51130220 is about 7150.5398397604. The cubic root of 51130220 is about 371.1583372502.

Adding to 51130220 its reverse (2203115), we get a palindrome (53333335).

The spelling of 51130220 in words is "fifty-one million, one hundred thirty thousand, two hundred twenty".