2166423136 has 12 divisors (see below), whose sum is σ = 4265145612. Its totient is φ = 1083211552.

The previous prime is 2166423131. The next prime is 2166423143. The reversal of 2166423136 is 6313246612.

It is a hoax number, since the sum of its digits (34) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2166423131) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33850330 + ... + 33850393.

It is an arithmetic number, because the mean of its divisors is an integer number (355428801).

Almost surely, 2^2166423136 is an apocalyptic number.

It is an amenable number.

2166423136 is a deficient number, since it is larger than the sum of its proper divisors (2098722476).

2166423136 is an equidigital number, since it uses as much as digits as its factorization.

2166423136 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 67700733 (or 67700725 counting only the distinct ones).

The product of its digits is 31104, while the sum is 34.

The square root of 2166423136 is about 46544.8508000617. The cubic root of 2166423136 is about 1293.9408633562.

Adding to 2166423136 its reverse (6313246612), we get a palindrome (8479669748).

The spelling of 2166423136 in words is "two billion, one hundred sixty-six million, four hundred twenty-three thousand, one hundred thirty-six".