3143521309 has 4 divisors (see below), whose sum is σ = 3144665916. Its totient is φ = 3142376704.

The previous prime is 3143521229. The next prime is 3143521313. The reversal of 3143521309 is 9031253413.

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

It can be written as a sum of positive squares in 2 ways, for example, as 3033586084 + 109935225 = 55078^2 + 10485^2 .

It is a cyclic number.

It is not a de Polignac number, because 3143521309 - 2¹¹ = 3143519261 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3143221309) 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, 568174 + ... + 573679.

It is an arithmetic number, because the mean of its divisors is an integer number (786166479).

Almost surely, 2^3143521309 is an apocalyptic number.

It is an amenable number.

3143521309 is a deficient number, since it is larger than the sum of its proper divisors (1144607).

3143521309 is a wasteful number, since it uses less digits than its factorization.

3143521309 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1144606.

The product of its (nonzero) digits is 9720, while the sum is 31.

The square root of 3143521309 is about 56067.1143273845. The cubic root of 3143521309 is about 1464.8915354939.

The spelling of 3143521309 in words is "three billion, one hundred forty-three million, five hundred twenty-one thousand, three hundred nine".