3505131620 has 12 divisors (see below), whose sum is σ = 7360776444. Its totient is φ = 1402052640.

The previous prime is 3505131611. The next prime is 3505131629. The reversal of 3505131620 is 261315053.

It is an interprime number because it is at equal distance from previous prime (3505131611) and next prime (3505131629).

It can be written as a sum of positive squares in 2 ways, for example, as 736688164 + 2768443456 = 27142^2 + 52616^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 3505131620.

It is not an unprimeable number, because it can be changed into a prime (3505131629) 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, 87628271 + ... + 87628310.

It is an arithmetic number, because the mean of its divisors is an integer number (613398037).

Almost surely, 2^3505131620 is an apocalyptic number.

It is an amenable number.

3505131620 is an abundant number, since it is smaller than the sum of its proper divisors (3855644824).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

3505131620 is a wasteful number, since it uses less digits than its factorization.

3505131620 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 175256590 (or 175256588 counting only the distinct ones).

The product of its (nonzero) digits is 2700, while the sum is 26.

The square root of 3505131620 is about 59204.1520503419. The cubic root of 3505131620 is about 1519.0361531411.

Adding to 3505131620 its reverse (261315053), we get a palindrome (3766446673).

The spelling of 3505131620 in words is "three billion, five hundred five million, one hundred thirty-one thousand, six hundred twenty".