2212551990 has 128 divisors (see below), whose sum is σ = 6454425600. Its totient is φ = 534885120.

The previous prime is 2212551977. The next prime is 2212551997. The reversal of 2212551990 is 991552122.

It is a happy number.

2212551990 is a `hidden beast` number, since 2 + 2 + 12 + 551 + 9 + 90 = 666.

2212551990 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 (2212551997) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 1374306 + ... + 1375914.

It is an arithmetic number, because the mean of its divisors is an integer number (50425200).

Almost surely, 2^2212551990 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2212551990, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3227212800).

2212551990 is an abundant number, since it is smaller than the sum of its proper divisors (4241873610).

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

2212551990 is a wasteful number, since it uses less digits than its factorization.

2212551990 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2099 (or 2093 counting only the distinct ones).

The product of its (nonzero) digits is 16200, while the sum is 36.

The square root of 2212551990 is about 47037.7719497852. The cubic root of 2212551990 is about 1303.0602440778.

The spelling of 2212551990 in words is "two billion, two hundred twelve million, five hundred fifty-one thousand, nine hundred ninety".