6531203145 has 16 divisors (see below), whose sum is σ = 10567342080. Its totient is φ = 3444169344.

The previous prime is 6531203141. The next prime is 6531203179. The reversal of 6531203145 is 5413021356.

It is not a de Polignac number, because 6531203145 - 2² = 6531203141 is a prime.

It is a super-2 number, since 2×6531203145² = 85313229042515782050, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (6531203141) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2444809 + ... + 2447478.

It is an arithmetic number, because the mean of its divisors is an integer number (660458880).

Almost surely, 2^6531203145 is an apocalyptic number.

It is an amenable number.

6531203145 is a deficient number, since it is larger than the sum of its proper divisors (4036138935).

6531203145 is a wasteful number, since it uses less digits than its factorization.

6531203145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4892384.

The product of its (nonzero) digits is 10800, while the sum is 30.

The square root of 6531203145 is about 80815.8594893354. The cubic root of 6531203145 is about 1869.2371224536.

The spelling of 6531203145 in words is "six billion, five hundred thirty-one million, two hundred three thousand, one hundred forty-five".