51132140 has 12 divisors (see below), whose sum is σ = 107377536. Its totient is φ = 20452848.

The previous prime is 51132139. The next prime is 51132143. The reversal of 51132140 is 4123115.

51132140 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 2×51132140² = 5228991481959200, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (51132143) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 1278284 + ... + 1278323.

It is an arithmetic number, because the mean of its divisors is an integer number (8948128).

Almost surely, 2^51132140 is an apocalyptic number.

It is an amenable number.

51132140 is an abundant number, since it is smaller than the sum of its proper divisors (56245396).

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

51132140 is a wasteful number, since it uses less digits than its factorization.

51132140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2556616 (or 2556614 counting only the distinct ones).

The product of its (nonzero) digits is 120, while the sum is 17.

The square root of 51132140 is about 7150.6740940977. The cubic root of 51132140 is about 371.1629830030.

Adding to 51132140 its reverse (4123115), we get a palindrome (55255255).

The spelling of 51132140 in words is "fifty-one million, one hundred thirty-two thousand, one hundred forty".