3115661573 has 2 divisors, whose sum is σ = 3115661574. Its totient is φ = 3115661572.

The previous prime is 3115661569. The next prime is 3115661611. The reversal of 3115661573 is 3751665113.

It is a happy number.

3115661573 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an a-pointer prime, because the next prime (3115661611) can be obtained adding 3115661573 to its sum of digits (38).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1692335044 + 1423326529 = 41138^2 + 37727^2 .

It is a cyclic number.

It is not a de Polignac number, because 3115661573 - 2² = 3115661569 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3115661533) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1557830786 + 1557830787.

It is an arithmetic number, because the mean of its divisors is an integer number (1557830787).

Almost surely, 2^3115661573 is an apocalyptic number.

It is an amenable number.

3115661573 is a deficient number, since it is larger than the sum of its proper divisors (1).

3115661573 is an equidigital number, since it uses as much as digits as its factorization.

3115661573 is an evil number, because the sum of its binary digits is even.

The product of its digits is 56700, while the sum is 38.

The square root of 3115661573 is about 55818.1115140955. Note that the first 3 decimals coincide. The cubic root of 3115661573 is about 1460.5511106721.

It can be divided in two parts, 31156 and 61573, that added together give a palindrome (92729).

The spelling of 3115661573 in words is "three billion, one hundred fifteen million, six hundred sixty-one thousand, five hundred seventy-three".