2147222440 has 128 divisors (see below), whose sum is σ = 5489648640. Its totient is φ = 755040000.

The previous prime is 2147222423. The next prime is 2147222489. The reversal of 2147222440 is 442227412.

It is a super-2 number, since 2×2147222440² = 9221128413679107200, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 2147222399 and 2147222408.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1649790 + ... + 1651090.

It is an arithmetic number, because the mean of its divisors is an integer number (42887880).

Almost surely, 2^2147222440 is an apocalyptic number.

2147222440 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2147222440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2744824320).

2147222440 is an abundant number, since it is smaller than the sum of its proper divisors (3342426200).

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

2147222440 is a wasteful number, since it uses less digits than its factorization.

2147222440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1376 (or 1350 counting only the distinct ones).

The product of its (nonzero) digits is 7168, while the sum is 28.

The square root of 2147222440 is about 46338.1315980694. The cubic root of 2147222440 is about 1290.1068437034.

Adding to 2147222440 its reverse (442227412), we get a palindrome (2589449852).

The spelling of 2147222440 in words is "two billion, one hundred forty-seven million, two hundred twenty-two thousand, four hundred forty".