13045345531 has 4 divisors (see below), whose sum is σ = 13229082864. Its totient is φ = 12861608200.

The previous prime is 13045345517. The next prime is 13045345541. The reversal of 13045345531 is 13554354031.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-13045345531 is a prime.

It is a super-2 number, since 2×13045345531² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13045345501) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 91868560 + ... + 91868701.

It is an arithmetic number, because the mean of its divisors is an integer number (3307270716).

Almost surely, 2^13045345531 is an apocalyptic number.

13045345531 is a deficient number, since it is larger than the sum of its proper divisors (183737333).

13045345531 is an equidigital number, since it uses as much as digits as its factorization.

13045345531 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 183737332.

The product of its (nonzero) digits is 54000, while the sum is 34.

Adding to 13045345531 its reverse (13554354031), we get a palindrome (26599699562).

The spelling of 13045345531 in words is "thirteen billion, forty-five million, three hundred forty-five thousand, five hundred thirty-one".