2218942140 has 48 divisors (see below), whose sum is σ = 6364582560. Its totient is φ = 577285120.

The previous prime is 2218942129. The next prime is 2218942177. The reversal of 2218942140 is 412498122.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 448545 + ... + 453464.

It is an arithmetic number, because the mean of its divisors is an integer number (132595470).

Almost surely, 2^2218942140 is an apocalyptic number.

2218942140 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2218942140 is an abundant number, since it is smaller than the sum of its proper divisors (4145640420).

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

2218942140 is a wasteful number, since it uses less digits than its factorization.

2218942140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 902062 (or 902060 counting only the distinct ones).

The product of its (nonzero) digits is 9216, while the sum is 33.

The square root of 2218942140 is about 47105.6487058612. The cubic root of 2218942140 is about 1304.3135098440.

The spelling of 2218942140 in words is "two billion, two hundred eighteen million, nine hundred forty-two thousand, one hundred forty".