2185511948 has 6 divisors (see below), whose sum is σ = 3824645916. Its totient is φ = 1092755972.

The previous prime is 2185511921. The next prime is 2185511981. The reversal of 2185511948 is 8491155812.

It is a junction number, because it is equal to n+sod(n) for n = 2185511899 and 2185511908.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 273188990 + ... + 273188997.

It is an arithmetic number, because the mean of its divisors is an integer number (637440986).

Almost surely, 2^2185511948 is an apocalyptic number.

It is an amenable number.

2185511948 is a deficient number, since it is larger than the sum of its proper divisors (1639133968).

2185511948 is a wasteful number, since it uses less digits than its factorization.

2185511948 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 546377991 (or 546377989 counting only the distinct ones).

The product of its digits is 115200, while the sum is 44.

The square root of 2185511948 is about 46749.4593337720. The cubic root of 2185511948 is about 1297.7301510966.

The spelling of 2185511948 in words is "two billion, one hundred eighty-five million, five hundred eleven thousand, nine hundred forty-eight".