3215665553 has 2 divisors, whose sum is σ = 3215665554. Its totient is φ = 3215665552.

The previous prime is 3215665499. The next prime is 3215665561. The reversal of 3215665553 is 3555665123.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1982742784 + 1232922769 = 44528^2 + 35113^2 .

It is an emirp because it is prime and its reverse (3555665123) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-3215665553 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 3215665553.

It is not a weakly prime, because it can be changed into another prime (3215662553) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1607832776 + 1607832777.

It is an arithmetic number, because the mean of its divisors is an integer number (1607832777).

Almost surely, 2^3215665553 is an apocalyptic number.

It is an amenable number.

3215665553 is a deficient number, since it is larger than the sum of its proper divisors (1).

3215665553 is an equidigital number, since it uses as much as digits as its factorization.

3215665553 is an evil number, because the sum of its binary digits is even.

The product of its digits is 405000, while the sum is 41.

The square root of 3215665553 is about 56706.8386792986. The cubic root of 3215665553 is about 1476.0133690093.

The spelling of 3215665553 in words is "three billion, two hundred fifteen million, six hundred sixty-five thousand, five hundred fifty-three".