2161443370 has 16 divisors (see below), whose sum is σ = 4024757160. Its totient is φ = 834764224.

The previous prime is 2161443313. The next prime is 2161443391. The reversal of 2161443370 is 733441612.

It can be written as a sum of positive squares in 4 ways, for example, as 1948604449 + 212838921 = 44143^2 + 14589^2 .

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, 3726337 + ... + 3726916.

Almost surely, 2^2161443370 is an apocalyptic number.

2161443370 is a deficient number, since it is larger than the sum of its proper divisors (1863313790).

2161443370 is a wasteful number, since it uses less digits than its factorization.

2161443370 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7453289.

The product of its (nonzero) digits is 12096, while the sum is 31.

The square root of 2161443370 is about 46491.3257500794. The cubic root of 2161443370 is about 1292.9486801308.

Adding to 2161443370 its reverse (733441612), we get a palindrome (2894884982).

The spelling of 2161443370 in words is "two billion, one hundred sixty-one million, four hundred forty-three thousand, three hundred seventy".