2166100442 has 16 divisors (see below), whose sum is σ = 3557714400. Its totient is φ = 980928240.

The previous prime is 2166100411. The next prime is 2166100459. The reversal of 2166100442 is 2440016612.

It is a super-2 number, since 2×2166100442² = 9383982249665190728, which contains 22 as substring.

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, 177092 + ... + 188927.

It is an arithmetic number, because the mean of its divisors is an integer number (222357150).

Almost surely, 2^2166100442 is an apocalyptic number.

2166100442 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

2166100442 is a deficient number, since it is larger than the sum of its proper divisors (1391613958).

2166100442 is a wasteful number, since it uses less digits than its factorization.

2166100442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 366301.

The product of its (nonzero) digits is 2304, while the sum is 26.

The square root of 2166100442 is about 46541.3841865495. The cubic root of 2166100442 is about 1293.8766149523.

The spelling of 2166100442 in words is "two billion, one hundred sixty-six million, one hundred thousand, four hundred forty-two".