51452140 has 12 divisors (see below), whose sum is σ = 108049536. Its totient is φ = 20580848.

The previous prime is 51452129. The next prime is 51452143. The reversal of 51452140 is 4125415.

It is not an unprimeable number, because it can be changed into a prime (51452143) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 1286284 + ... + 1286323.

It is an arithmetic number, because the mean of its divisors is an integer number (9004128).

Almost surely, 2^51452140 is an apocalyptic number.

It is an amenable number.

51452140 is an abundant number, since it is smaller than the sum of its proper divisors (56597396).

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

51452140 is a wasteful number, since it uses less digits than its factorization.

51452140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2572616 (or 2572614 counting only the distinct ones).

The product of its (nonzero) digits is 800, while the sum is 22.

The square root of 51452140 is about 7173.0147079174. The cubic root of 51452140 is about 371.9356558076.

Adding to 51452140 its reverse (4125415), we get a palindrome (55577555).

The spelling of 51452140 in words is "fifty-one million, four hundred fifty-two thousand, one hundred forty".