2161293236 has 12 divisors (see below), whose sum is σ = 3838715328. Its totient is φ = 1064517432.

The previous prime is 2161293203. The next prime is 2161293269. The reversal of 2161293236 is 6323921612.

It is an interprime number because it is at equal distance from previous prime (2161293203) and next prime (2161293269).

It is a junction number, because it is equal to n+sod(n) for n = 2161293196 and 2161293205.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4031996 + ... + 4032531.

It is an arithmetic number, because the mean of its divisors is an integer number (319892944).

Almost surely, 2^2161293236 is an apocalyptic number.

It is an amenable number.

2161293236 is a deficient number, since it is larger than the sum of its proper divisors (1677422092).

2161293236 is a wasteful number, since it uses less digits than its factorization.

2161293236 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8064598 (or 8064596 counting only the distinct ones).

The product of its digits is 23328, while the sum is 35.

The square root of 2161293236 is about 46489.7110767533. The cubic root of 2161293236 is about 1292.9187433372.

The spelling of 2161293236 in words is "two billion, one hundred sixty-one million, two hundred ninety-three thousand, two hundred thirty-six".