15430208081 has 2 divisors, whose sum is σ = 15430208082. Its totient is φ = 15430208080.

The previous prime is 15430208051. The next prime is 15430208093. The reversal of 15430208081 is 18080203451.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 9690630481 + 5739577600 = 98441^2 + 75760^2 .

It is an emirp because it is prime and its reverse (18080203451) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-15430208081 is a prime.

It is a super-2 number, since 2×15430208081² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (15430208051) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7715104040 + 7715104041.

It is an arithmetic number, because the mean of its divisors is an integer number (7715104041).

Almost surely, 2^15430208081 is an apocalyptic number.

It is an amenable number.

15430208081 is a deficient number, since it is larger than the sum of its proper divisors (1).

15430208081 is an equidigital number, since it uses as much as digits as its factorization.

15430208081 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 7680, while the sum is 32.

The spelling of 15430208081 in words is "fifteen billion, four hundred thirty million, two hundred eight thousand, eighty-one".