51440534 has 16 divisors (see below), whose sum is σ = 78558720. Its totient is φ = 25257960.

The previous prime is 51440531. The next prime is 51440537. The reversal of 51440534 is 43504415.

51440534 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (51440531) and next prime (51440537).

It is a super-2 number, since 2×51440534² = 5292257076410312, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51440531) 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 7 ways as a sum of consecutive naturals, for example, 32567 + ... + 34109.

It is an arithmetic number, because the mean of its divisors is an integer number (4909920).

Almost surely, 2^51440534 is an apocalyptic number.

51440534 is a deficient number, since it is larger than the sum of its proper divisors (27118186).

51440534 is a wasteful number, since it uses less digits than its factorization.

51440534 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1835.

The product of its (nonzero) digits is 4800, while the sum is 26.

The square root of 51440534 is about 7172.2056579549. The cubic root of 51440534 is about 371.9076880053.

Adding to 51440534 its reverse (43504415), we get a palindrome (94944949).

The spelling of 51440534 in words is "fifty-one million, four hundred forty thousand, five hundred thirty-four".