4252181994 has 40 divisors (see below), whose sum is σ = 9942308640. Its totient is φ = 1355766984.

The previous prime is 4252181993. The next prime is 4252182019. The reversal of 4252181994 is 4991812524.

It is a happy number.

4252181994 is a `hidden beast` number, since 42 + 521 + 81 + 9 + 9 + 4 = 666.

It is not an unprimeable number, because it can be changed into a prime (4252181993) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 566884 + ... + 574335.

It is an arithmetic number, because the mean of its divisors is an integer number (248557716).

Almost surely, 2^4252181994 is an apocalyptic number.

4252181994 is an abundant number, since it is smaller than the sum of its proper divisors (5690126646).

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

4252181994 is a wasteful number, since it uses less digits than its factorization.

4252181994 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1141256 (or 1141247 counting only the distinct ones).

The product of its digits is 207360, while the sum is 45.

The square root of 4252181994 is about 65208.7570346192. The cubic root of 4252181994 is about 1620.0830615848.

The spelling of 4252181994 in words is "four billion, two hundred fifty-two million, one hundred eighty-one thousand, nine hundred ninety-four".