51440302 has 8 divisors (see below), whose sum is σ = 77507136. Its totient is φ = 25604592.

The previous prime is 51440299. The next prime is 51440303. The reversal of 51440302 is 20304415.

51440302 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×51440302² = 5292209339702408, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 51440302.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51440303) 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, 57223 + ... + 58114.

It is an arithmetic number, because the mean of its divisors is an integer number (9688392).

Almost surely, 2^51440302 is an apocalyptic number.

51440302 is a deficient number, since it is larger than the sum of its proper divisors (26066834).

51440302 is a wasteful number, since it uses less digits than its factorization.

51440302 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 115562.

The product of its (nonzero) digits is 480, while the sum is 19.

The square root of 51440302 is about 7172.1894843904. The cubic root of 51440302 is about 371.9071288956.

Adding to 51440302 its reverse (20304415), we get a palindrome (71744717).

The spelling of 51440302 in words is "fifty-one million, four hundred forty thousand, three hundred two".