2180312356 has 24 divisors (see below), whose sum is σ = 4044834360. Its totient is φ = 1024799232.

The previous prime is 2180312341. The next prime is 2180312363. The reversal of 2180312356 is 6532130812.

It can be written as a sum of positive squares in 4 ways, for example, as 267649600 + 1912662756 = 16360^2 + 43734^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 39210 + ... + 76798.

It is an arithmetic number, because the mean of its divisors is an integer number (168534765).

Almost surely, 2^2180312356 is an apocalyptic number.

It is an amenable number.

2180312356 is a deficient number, since it is larger than the sum of its proper divisors (1864522004).

2180312356 is a wasteful number, since it uses less digits than its factorization.

2180312356 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38463 (or 38461 counting only the distinct ones).

The product of its (nonzero) digits is 8640, while the sum is 31.

The square root of 2180312356 is about 46693.8149651536. The cubic root of 2180312356 is about 1296.7001825701.

The spelling of 2180312356 in words is "two billion, one hundred eighty million, three hundred twelve thousand, three hundred fifty-six".