3915531565 has 12 divisors (see below), whose sum is σ = 5164619292. Its totient is φ = 2847658880.

The previous prime is 3915531559. The next prime is 3915531583. The reversal of 3915531565 is 5651355193.

It can be written as a sum of positive squares in 2 ways, for example, as 488365801 + 3427165764 = 22099^2 + 58542^2 .

It is not a de Polignac number, because 3915531565 - 2¹¹ = 3915529517 is a prime.

It is a super-2 number, since 2×3915531565² = 30662774873022698450, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3235372 + ... + 3236581.

It is an arithmetic number, because the mean of its divisors is an integer number (430384941).

Almost surely, 2^3915531565 is an apocalyptic number.

It is an amenable number.

3915531565 is a deficient number, since it is larger than the sum of its proper divisors (1249087727).

3915531565 is a wasteful number, since it uses less digits than its factorization.

3915531565 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6471980 (or 6471969 counting only the distinct ones).

The product of its digits is 303750, while the sum is 43.

The square root of 3915531565 is about 62574.2084648300. The cubic root of 3915531565 is about 1576.1476898975.

The spelling of 3915531565 in words is "three billion, nine hundred fifteen million, five hundred thirty-one thousand, five hundred sixty-five".