2161143402 has 16 divisors (see below), whose sum is σ = 4715222112. Its totient is φ = 654891920.

The previous prime is 2161143349. The next prime is 2161143421. The reversal of 2161143402 is 2043411612.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16372233 + ... + 16372364.

It is an arithmetic number, because the mean of its divisors is an integer number (294701382).

Almost surely, 2^2161143402 is an apocalyptic number.

2161143402 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

2161143402 is an abundant number, since it is smaller than the sum of its proper divisors (2554078710).

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

2161143402 is a wasteful number, since it uses less digits than its factorization.

2161143402 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32744613.

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

The square root of 2161143402 is about 46488.0995739770. The cubic root of 2161143402 is about 1292.8888649816. Note that the first 4 decimals are identical.

The spelling of 2161143402 in words is "two billion, one hundred sixty-one million, one hundred forty-three thousand, four hundred two".