2231612221645 has 8 divisors (see below), whose sum is σ = 2693970203904. Its totient is φ = 1774599418704.

The previous prime is 2231612221607. The next prime is 2231612221661. The reversal of 2231612221645 is 5461222161322.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 2231612221645 - 2¹¹ = 2231612219597 is a prime.

It is a super-3 number, since 3×2231612221645³ (a number of 38 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1336293909 + ... + 1336295578.

It is an arithmetic number, because the mean of its divisors is an integer number (336746275488).

Almost surely, 2^{2231612221645} is an apocalyptic number.

It is an amenable number.

2231612221645 is a deficient number, since it is larger than the sum of its proper divisors (462357982259).

2231612221645 is a wasteful number, since it uses less digits than its factorization.

2231612221645 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2672589659.

The product of its digits is 69120, while the sum is 37.

Adding to 2231612221645 its reverse (5461222161322), we get a palindrome (7692834382967).

The spelling of 2231612221645 in words is "two trillion, two hundred thirty-one billion, six hundred twelve million, two hundred twenty-one thousand, six hundred forty-five".