2211223140 has 72 divisors (see below), whose sum is σ = 7665577920. Its totient is φ = 505422144.

The previous prime is 2211223127. The next prime is 2211223163. The reversal of 2211223140 is 413221122.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 876210 + ... + 878729.

It is an arithmetic number, because the mean of its divisors is an integer number (106466360).

Almost surely, 2^2211223140 is an apocalyptic number.

2211223140 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2211223140 is an abundant number, since it is smaller than the sum of its proper divisors (5454354780).

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

2211223140 is a wasteful number, since it uses less digits than its factorization.

2211223140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1754961 (or 1754956 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 18.

The square root of 2211223140 is about 47023.6444780708. The cubic root of 2211223140 is about 1302.7993208864.

Adding to 2211223140 its reverse (413221122), we get a palindrome (2624444262).

The spelling of 2211223140 in words is "two billion, two hundred eleven million, two hundred twenty-three thousand, one hundred forty".