2231266165220 has 24 divisors (see below), whose sum is σ = 4689328271544. Its totient is φ = 891807547136.

The previous prime is 2231266165157. The next prime is 2231266165229. The reversal of 2231266165220 is 225616621322.

It can be written as a sum of positive squares in 4 ways, for example, as 782825031076 + 1448441134144 = 884774^2 + 1203512^2 .

It is a super-3 number, since 3×2231266165220³ (a number of 38 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (2231266165229) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 43656257 + ... + 43707336.

It is an arithmetic number, because the mean of its divisors is an integer number (195388677981).

Almost surely, 2^{2231266165220} is an apocalyptic number.

2231266165220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2231266165220 is an abundant number, since it is smaller than the sum of its proper divisors (2458062106324).

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

2231266165220 is a wasteful number, since it uses less digits than its factorization.

2231266165220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 87364879 (or 87364877 counting only the distinct ones).

The product of its (nonzero) digits is 103680, while the sum is 38.

The spelling of 2231266165220 in words is "two trillion, two hundred thirty-one billion, two hundred sixty-six million, one hundred sixty-five thousand, two hundred twenty".