2211561341545 has 8 divisors (see below), whose sum is σ = 2653954759296. Its totient is φ = 1769194973616.

The previous prime is 2211561341471. The next prime is 2211561341569. The reversal of 2211561341545 is 5451431651122.

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 2211561341545 - 2¹⁵ = 2211561308777 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2211561341498 and 2211561341507.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6582147 + ... + 6909976.

It is an arithmetic number, because the mean of its divisors is an integer number (331744344912).

Almost surely, 2^{2211561341545} is an apocalyptic number.

It is an amenable number.

2211561341545 is a deficient number, since it is larger than the sum of its proper divisors (442393417751).

2211561341545 is a wasteful number, since it uses less digits than its factorization.

2211561341545 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13524911.

The product of its digits is 144000, while the sum is 40.

Adding to 2211561341545 its reverse (5451431651122), we get a palindrome (7662992992667).

The spelling of 2211561341545 in words is "two trillion, two hundred eleven billion, five hundred sixty-one million, three hundred forty-one thousand, five hundred forty-five".