2181241478 has 32 divisors (see below), whose sum is σ = 3762291456. Its totient is φ = 940550688.

The previous prime is 2181241453. The next prime is 2181241537. The reversal of 2181241478 is 8741421812.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 16700 + ... + 68127.

It is an arithmetic number, because the mean of its divisors is an integer number (117571608).

Almost surely, 2^2181241478 is an apocalyptic number.

2181241478 is a deficient number, since it is larger than the sum of its proper divisors (1581049978).

2181241478 is a wasteful number, since it uses less digits than its factorization.

2181241478 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 84908.

The product of its digits is 28672, while the sum is 38.

The square root of 2181241478 is about 46703.7629961441. The cubic root of 2181241478 is about 1296.8843490828.

The spelling of 2181241478 in words is "two billion, one hundred eighty-one million, two hundred forty-one thousand, four hundred seventy-eight".