2193151890 has 64 divisors (see below), whose sum is σ = 5498585856. Its totient is φ = 558784512.

The previous prime is 2193151871. The next prime is 2193151897. The reversal of 2193151890 is 981513912.

It is a super-2 number, since 2×2193151890² = 9619830425221144200, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (2193151897) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1169994 + ... + 1171866.

It is an arithmetic number, because the mean of its divisors is an integer number (85915404).

Almost surely, 2^2193151890 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2193151890, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2749292928).

2193151890 is an abundant number, since it is smaller than the sum of its proper divisors (3305433966).

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

2193151890 is a wasteful number, since it uses less digits than its factorization.

2193151890 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3603.

The product of its (nonzero) digits is 19440, while the sum is 39.

The square root of 2193151890 is about 46831.0996027213. The cubic root of 2193151890 is about 1299.2405603784.

The spelling of 2193151890 in words is "two billion, one hundred ninety-three million, one hundred fifty-one thousand, eight hundred ninety".