3145481813 has 2 divisors, whose sum is σ = 3145481814. Its totient is φ = 3145481812.

The previous prime is 3145481803. The next prime is 3145481819. The reversal of 3145481813 is 3181845413.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2902838884 + 242642929 = 53878^2 + 15577^2 .

It is a cyclic number.

It is not a de Polignac number, because 3145481813 - 2¹⁶ = 3145416277 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3145481819) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1572740906 + 1572740907.

It is an arithmetic number, because the mean of its divisors is an integer number (1572740907).

Almost surely, 2^3145481813 is an apocalyptic number.

It is an amenable number.

3145481813 is a deficient number, since it is larger than the sum of its proper divisors (1).

3145481813 is an equidigital number, since it uses as much as digits as its factorization.

3145481813 is an evil number, because the sum of its binary digits is even.

The product of its digits is 46080, while the sum is 38.

The square root of 3145481813 is about 56084.5951487572. The cubic root of 3145481813 is about 1465.1960060329.

The spelling of 3145481813 in words is "three billion, one hundred forty-five million, four hundred eighty-one thousand, eight hundred thirteen".