545115512531 has 4 divisors (see below), whose sum is σ = 563912599200. Its totient is φ = 526318425864.

The previous prime is 545115512509. The next prime is 545115512533. The reversal of 545115512531 is 135215511545.

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-545115512531 is a prime.

It is a super-2 number, since 2×545115512531² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (545115512533) 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, 9398543291 + ... + 9398543348.

It is an arithmetic number, because the mean of its divisors is an integer number (140978149800).

Almost surely, 2^545115512531 is an apocalyptic number.

545115512531 is a deficient number, since it is larger than the sum of its proper divisors (18797086669).

545115512531 is a wasteful number, since it uses less digits than its factorization.

545115512531 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18797086668.

The product of its digits is 75000, while the sum is 38.

The spelling of 545115512531 in words is "five hundred forty-five billion, one hundred fifteen million, five hundred twelve thousand, five hundred thirty-one".