2142199661 has 8 divisors (see below), whose sum is σ = 2462381184. Its totient is φ = 1825556400.

The previous prime is 2142199649. The next prime is 2142199667. The reversal of 2142199661 is 1669912412.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2142199661 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2142199667) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 883265 + ... + 885686.

It is an arithmetic number, because the mean of its divisors is an integer number (307797648).

Almost surely, 2^2142199661 is an apocalyptic number.

It is an amenable number.

2142199661 is a deficient number, since it is larger than the sum of its proper divisors (320181523).

2142199661 is a wasteful number, since it uses less digits than its factorization.

2142199661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1769131.

The product of its digits is 46656, while the sum is 41.

The square root of 2142199661 is about 46283.9028280892. The cubic root of 2142199661 is about 1289.1001197570.

The spelling of 2142199661 in words is "two billion, one hundred forty-two million, one hundred ninety-nine thousand, six hundred sixty-one".