2165478050 has 18 divisors (see below), whose sum is σ = 4028401299. Its totient is φ = 866059600.

The previous prime is 2165478043. The next prime is 2165478067. The reversal of 2165478050 is 508745612.

It can be written as a sum of positive squares in 5 ways, for example, as 282004849 + 1883473201 = 16793^2 + 43399^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=32905.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2165477995 and 2165478013.

It is an unprimeable number.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 325760 + ... + 332340.

Almost surely, 2^2165478050 is an apocalyptic number.

2165478050 is a deficient number, since it is larger than the sum of its proper divisors (1862923249).

2165478050 is an frugal number, since it uses more digits than its factorization.

2165478050 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13174 (or 6588 counting only the distinct ones).

The product of its (nonzero) digits is 67200, while the sum is 38.

The square root of 2165478050 is about 46534.6972698867. The cubic root of 2165478050 is about 1293.7526786256.

The spelling of 2165478050 in words is "two billion, one hundred sixty-five million, four hundred seventy-eight thousand, fifty".