2161421430 has 64 divisors (see below), whose sum is σ = 6054635520. Its totient is φ = 483525504.

The previous prime is 2161421413. The next prime is 2161421443. The reversal of 2161421430 is 341241612.

It is a self number, because there is not a number n which added to its sum of digits gives 2161421430.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 99625 + ... + 119364.

It is an arithmetic number, because the mean of its divisors is an integer number (94603680).

Almost surely, 2^2161421430 is an apocalyptic number.

2161421430 is an abundant number, since it is smaller than the sum of its proper divisors (3893214090).

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

2161421430 is a wasteful number, since it uses less digits than its factorization.

2161421430 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 219053.

The product of its (nonzero) digits is 1152, while the sum is 24.

The square root of 2161421430 is about 46491.0897914859. The cubic root of 2161421430 is about 1292.9443053705.

The spelling of 2161421430 in words is "two billion, one hundred sixty-one million, four hundred twenty-one thousand, four hundred thirty".