2221995240 has 160 divisors (see below), whose sum is σ = 7486787880. Its totient is φ = 591072768.

The previous prime is 2221995233. The next prime is 2221995289. The reversal of 2221995240 is 425991222.

2221995240 is a `hidden beast` number, since 22 + 21 + 99 + 524 + 0 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 1748410596 + 473584644 = 41814^2 + 21762^2 .

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 2221995195 and 2221995204.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 2192974 + ... + 2193986.

Almost surely, 2^2221995240 is an apocalyptic number.

2221995240 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 2221995240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3743393940).

2221995240 is an abundant number, since it is smaller than the sum of its proper divisors (5264792640).

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

2221995240 is a wasteful number, since it uses less digits than its factorization.

2221995240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1713 (or 1700 counting only the distinct ones).

The product of its (nonzero) digits is 25920, while the sum is 36.

The square root of 2221995240 is about 47138.0445075949. The cubic root of 2221995240 is about 1304.9114486090.

The spelling of 2221995240 in words is "two billion, two hundred twenty-one million, nine hundred ninety-five thousand, two hundred forty".