15503453081 has 2 divisors, whose sum is σ = 15503453082. Its totient is φ = 15503453080.

The previous prime is 15503453027. The next prime is 15503453083. The reversal of 15503453081 is 18035430551.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 13815886681 + 1687566400 = 117541^2 + 41080^2 .

It is a cyclic number.

It is not a de Polignac number, because 15503453081 - 2²² = 15499258777 is a prime.

It is a super-4 number, since 4×15503453081⁴ (a number of 42 digits) contains 4444 as substring. Note that it is a super-d number also for d = 2.

Together with 15503453083, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (15503453083) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7751726540 + 7751726541.

It is an arithmetic number, because the mean of its divisors is an integer number (7751726541).

Almost surely, 2^15503453081 is an apocalyptic number.

It is an amenable number.

15503453081 is a deficient number, since it is larger than the sum of its proper divisors (1).

15503453081 is an equidigital number, since it uses as much as digits as its factorization.

15503453081 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 36000, while the sum is 35.

The spelling of 15503453081 in words is "fifteen billion, five hundred three million, four hundred fifty-three thousand, eighty-one".