2231856211580 has 144 divisors (see below), whose sum is σ = 4943350828416. Its totient is φ = 846196243200.

The previous prime is 2231856211573. The next prime is 2231856211591. The reversal of 2231856211580 is 851126581322.

It is a super-3 number, since 3×2231856211580³ (a number of 38 digits) contains 333 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 345967355 + ... + 345973805.

Almost surely, 2^{2231856211580} is an apocalyptic number.

2231856211580 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 2231856211580, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2471675414208).

2231856211580 is an abundant number, since it is smaller than the sum of its proper divisors (2711494616836).

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

2231856211580 is a wasteful number, since it uses less digits than its factorization.

2231856211580 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6892 (or 6861 counting only the distinct ones).

The product of its (nonzero) digits is 230400, while the sum is 44.

The spelling of 2231856211580 in words is "two trillion, two hundred thirty-one billion, eight hundred fifty-six million, two hundred eleven thousand, five hundred eighty".