51370840 has 16 divisors (see below), whose sum is σ = 115584480. Its totient is φ = 20548320.

The previous prime is 51370829. The next prime is 51370849. The reversal of 51370840 is 4807315.

It is a junction number, because it is equal to n+sod(n) for n = 51370799 and 51370808.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51370849) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 642096 + ... + 642175.

It is an arithmetic number, because the mean of its divisors is an integer number (7224030).

Almost surely, 2^51370840 is an apocalyptic number.

It is an amenable number.

51370840 is an abundant number, since it is smaller than the sum of its proper divisors (64213640).

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

51370840 is a wasteful number, since it uses less digits than its factorization.

51370840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1284282 (or 1284278 counting only the distinct ones).

The product of its (nonzero) digits is 3360, while the sum is 28.

The square root of 51370840 is about 7167.3453942167. The cubic root of 51370840 is about 371.7396528849.

The spelling of 51370840 in words is "fifty-one million, three hundred seventy thousand, eight hundred forty".