51471340 has 24 divisors (see below), whose sum is σ = 108610992. Its totient is φ = 20489280.

The previous prime is 51471307. The next prime is 51471347. The reversal of 51471340 is 4317415.

51471340 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (51471347) 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, 1879 + ... + 10318.

It is an arithmetic number, because the mean of its divisors is an integer number (4525458).

Almost surely, 2^51471340 is an apocalyptic number.

It is an amenable number.

51471340 is an abundant number, since it is smaller than the sum of its proper divisors (57139652).

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

51471340 is a wasteful number, since it uses less digits than its factorization.

51471340 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12417 (or 12415 counting only the distinct ones).

The product of its (nonzero) digits is 1680, while the sum is 25.

The square root of 51471340 is about 7174.3529324950. The cubic root of 51471340 is about 371.9819141783.

Adding to 51471340 its reverse (4317415), we get a palindrome (55788755).

The spelling of 51471340 in words is "fifty-one million, four hundred seventy-one thousand, three hundred forty".