51440355 has 24 divisors (see below), whose sum is σ = 89723088. Its totient is φ = 27262656.

The previous prime is 51440327. The next prime is 51440359. The reversal of 51440355 is 55304415.

51440355 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 51440355 - 2⁸ = 51440099 is a prime.

It is a super-2 number, since 2×51440355² = 5292220245052050, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (51440359) 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 23 ways as a sum of consecutive naturals, for example, 3829 + ... + 10841.

It is an arithmetic number, because the mean of its divisors is an integer number (3738462).

Almost surely, 2^51440355 is an apocalyptic number.

51440355 is a deficient number, since it is larger than the sum of its proper divisors (38282733).

51440355 is a wasteful number, since it uses less digits than its factorization.

51440355 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7187 (or 7184 counting only the distinct ones).

The product of its (nonzero) digits is 6000, while the sum is 27.

The square root of 51440355 is about 7172.1931792165. The cubic root of 51440355 is about 371.9072566234.

The spelling of 51440355 in words is "fifty-one million, four hundred forty thousand, three hundred fifty-five".