51130940 has 48 divisors (see below), whose sum is σ = 123125184. Its totient is φ = 17472000.

The previous prime is 51130939. The next prime is 51130967. The reversal of 51130940 is 4903115.

It is a happy number.

It is a super-2 number, since 2×51130940² = 5228746050567200, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 72590 + ... + 73290.

It is an arithmetic number, because the mean of its divisors is an integer number (2565108).

Almost surely, 2^51130940 is an apocalyptic number.

It is an amenable number.

51130940 is an abundant number, since it is smaller than the sum of its proper divisors (71994244).

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

51130940 is a wasteful number, since it uses less digits than its factorization.

51130940 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1238 (or 1236 counting only the distinct ones).

The product of its (nonzero) digits is 540, while the sum is 23.

The square root of 51130940 is about 7150.5901854322. The cubic root of 51130940 is about 371.1600794211.

The spelling of 51130940 in words is "fifty-one million, one hundred thirty thousand, nine hundred forty".