51301340 has 12 divisors (see below), whose sum is σ = 107732856. Its totient is φ = 20520528.

The previous prime is 51301321. The next prime is 51301363. The reversal of 51301340 is 4310315.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1282514 + ... + 1282553.

It is an arithmetic number, because the mean of its divisors is an integer number (8977738).

Almost surely, 2^51301340 is an apocalyptic number.

It is an amenable number.

51301340 is an abundant number, since it is smaller than the sum of its proper divisors (56431516).

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

51301340 is a wasteful number, since it uses less digits than its factorization.

51301340 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2565076 (or 2565074 counting only the distinct ones).

The product of its (nonzero) digits is 180, while the sum is 17.

The square root of 51301340 is about 7162.4953752167. The cubic root of 51301340 is about 371.5719340919.

Adding to 51301340 its reverse (4310315), we get a palindrome (55611655).

Subtracting from 51301340 its reverse (4310315), we obtain a square (46991025 = 6855²).

The spelling of 51301340 in words is "fifty-one million, three hundred one thousand, three hundred forty".