51086340 has 36 divisors (see below), whose sum is σ = 154962444. Its totient is φ = 13622976.

The previous prime is 51086333. The next prime is 51086363. The reversal of 51086340 is 4368015.

It can be written as a sum of positive squares in 2 ways, for example, as 34292736 + 16793604 = 5856^2 + 4098^2 .

It is a tau number, because it is divible by the number of its divisors (36).

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 141727 + ... + 142086.

Almost surely, 2^51086340 is an apocalyptic number.

It is an amenable number.

51086340 is an abundant number, since it is smaller than the sum of its proper divisors (103876104).

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

51086340 is a wasteful number, since it uses less digits than its factorization.

51086340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 283828 (or 283823 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 27.

The square root of 51086340 is about 7147.4708813678. The cubic root of 51086340 is about 371.0521307245.

The spelling of 51086340 in words is "fifty-one million, eighty-six thousand, three hundred forty".