45131535209 has 2 divisors, whose sum is σ = 45131535210. Its totient is φ = 45131535208.

The previous prime is 45131535193. The next prime is 45131535233. The reversal of 45131535209 is 90253513154.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 43712355625 + 1419179584 = 209075^2 + 37672^2 .

It is a cyclic number.

It is not a de Polignac number, because 45131535209 - 2⁴ = 45131535193 is a prime.

It is a super-3 number, since 3×45131535209³ (a number of 33 digits) contains 333 as substring.

It is not a weakly prime, because it can be changed into another prime (45131535289) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 22565767604 + 22565767605.

It is an arithmetic number, because the mean of its divisors is an integer number (22565767605).

Almost surely, 2^45131535209 is an apocalyptic number.

It is an amenable number.

45131535209 is a deficient number, since it is larger than the sum of its proper divisors (1).

45131535209 is an equidigital number, since it uses as much as digits as its factorization.

45131535209 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 81000, while the sum is 38.

The spelling of 45131535209 in words is "forty-five billion, one hundred thirty-one million, five hundred thirty-five thousand, two hundred nine".