2138222540 has 24 divisors (see below), whose sum is σ = 4566376080. Its totient is φ = 840792128.

The previous prime is 2138222521. The next prime is 2138222557. The reversal of 2138222540 is 452228312.

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, 904847 + ... + 907206.

It is an arithmetic number, because the mean of its divisors is an integer number (190265670).

Almost surely, 2^2138222540 is an apocalyptic number.

2138222540 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2138222540 is an abundant number, since it is smaller than the sum of its proper divisors (2428153540).

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

2138222540 is a wasteful number, since it uses less digits than its factorization.

2138222540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1812121 (or 1812119 counting only the distinct ones).

The product of its (nonzero) digits is 7680, while the sum is 29.

The square root of 2138222540 is about 46240.9184597365. The cubic root of 2138222540 is about 1288.3018618837.

The spelling of 2138222540 in words is "two billion, one hundred thirty-eight million, two hundred twenty-two thousand, five hundred forty".