51321494 has 16 divisors (see below), whose sum is σ = 88970400. Its totient is φ = 21747264.

The previous prime is 51321469. The next prime is 51321499. The reversal of 51321494 is 49412315.

51321494 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51321499) 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, 19349 + ... + 21840.

It is an arithmetic number, because the mean of its divisors is an integer number (5560650).

Almost surely, 2^51321494 is an apocalyptic number.

51321494 is a deficient number, since it is larger than the sum of its proper divisors (37648906).

51321494 is a wasteful number, since it uses less digits than its factorization.

51321494 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41287.

The product of its digits is 4320, while the sum is 29.

The square root of 51321494 is about 7163.9021489688. The cubic root of 51321494 is about 371.6205857147.

It can be divided in two parts, 51321 and 494, that added together give a palindrome (51815).

The spelling of 51321494 in words is "fifty-one million, three hundred twenty-one thousand, four hundred ninety-four".