2161224604 has 24 divisors (see below), whose sum is σ = 4715399808. Its totient is φ = 842035440.

The previous prime is 2161224599. The next prime is 2161224629. The reversal of 2161224604 is 4064221612.

It is a Harshad number since it is a multiple of its sum of digits (28).

It is a congruent number.

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, 3508174 + ... + 3508789.

It is an arithmetic number, because the mean of its divisors is an integer number (196474992).

Almost surely, 2^2161224604 is an apocalyptic number.

It is an amenable number.

2161224604 is an abundant number, since it is smaller than the sum of its proper divisors (2554175204).

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

2161224604 is a wasteful number, since it uses less digits than its factorization.

2161224604 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7016985 (or 7016983 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 28.

The square root of 2161224604 is about 46488.9729290721. The cubic root of 2161224604 is about 1292.9050576209.

The spelling of 2161224604 in words is "two billion, one hundred sixty-one million, two hundred twenty-four thousand, six hundred four".