1331105545 has 16 divisors (see below), whose sum is σ = 1991472768. Its totient is φ = 829779840.

The previous prime is 1331105453. The next prime is 1331105569. The reversal of 1331105545 is 5455011331.

It is not a de Polignac number, because 1331105545 - 2²¹ = 1329008393 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1728324 + ... + 1729093.

It is an arithmetic number, because the mean of its divisors is an integer number (124467048).

Almost surely, 2^1331105545 is an apocalyptic number.

It is an amenable number.

1331105545 is a deficient number, since it is larger than the sum of its proper divisors (660367223).

1331105545 is a wasteful number, since it uses less digits than its factorization.

1331105545 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3457440.

The product of its (nonzero) digits is 4500, while the sum is 28.

The square root of 1331105545 is about 36484.3191659102. The cubic root of 1331105545 is about 1100.0290749891.

Adding to 1331105545 its reverse (5455011331), we get a palindrome (6786116876).

The spelling of 1331105545 in words is "one billion, three hundred thirty-one million, one hundred five thousand, five hundred forty-five".