51130140 has 48 divisors (see below), whose sum is σ = 150702720. Its totient is φ = 12916800.

The previous prime is 51130133. The next prime is 51130141. The reversal of 51130140 is 4103115.

It is a super-2 number, since 2×51130140² = 5228582432839200, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51130141) 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, 21286 + ... + 23565.

It is an arithmetic number, because the mean of its divisors is an integer number (3139640).

Almost surely, 2^51130140 is an apocalyptic number.

It is an amenable number.

51130140 is an abundant number, since it is smaller than the sum of its proper divisors (99572580).

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

51130140 is a wasteful number, since it uses less digits than its factorization.

51130140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44882 (or 44880 counting only the distinct ones).

The product of its (nonzero) digits is 60, while the sum is 15.

The square root of 51130140 is about 7150.5342457749. The cubic root of 51130140 is about 371.1581436746.

Adding to 51130140 its reverse (4103115), we get a palindrome (55233255).

The spelling of 51130140 in words is "fifty-one million, one hundred thirty thousand, one hundred forty".