2271321990 has 240 divisors, whose sum is σ = 7204530528. Its totient is φ = 495500544.

The previous prime is 2271321973. The next prime is 2271321991. The reversal of 2271321990 is 991231722.

2271321990 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2271321991) by changing a digit.

It is a polite number, since it can be written in 119 ways as a sum of consecutive naturals, for example, 4969842 + ... + 4970298.

Almost surely, 2^2271321990 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2271321990, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3602265264).

2271321990 is an abundant number, since it is smaller than the sum of its proper divisors (4933208538).

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

2271321990 is a wasteful number, since it uses less digits than its factorization.

2271321990 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 521 (or 497 counting only the distinct ones).

The product of its (nonzero) digits is 13608, while the sum is 36.

The square root of 2271321990 is about 47658.3884536605. The cubic root of 2271321990 is about 1314.4969069260.

The spelling of 2271321990 in words is "two billion, two hundred seventy-one million, three hundred twenty-one thousand, nine hundred ninety".