51556266 has 12 divisors (see below), whose sum is σ = 111705282. Its totient is φ = 17185416.

The previous prime is 51556247. The next prime is 51556273. The reversal of 51556266 is 66265515.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 51538041 + 18225 = 7179^2 + 135^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 51556266.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1432101 + ... + 1432136.

Almost surely, 2^51556266 is an apocalyptic number.

51556266 is an abundant number, since it is smaller than the sum of its proper divisors (60149016).

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

51556266 is a wasteful number, since it uses less digits than its factorization.

51556266 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2864245 (or 2864242 counting only the distinct ones).

The product of its digits is 54000, while the sum is 36.

The square root of 51556266 is about 7180.2692150086. The cubic root of 51556266 is about 372.1863876924.

The spelling of 51556266 in words is "fifty-one million, five hundred fifty-six thousand, two hundred sixty-six".