15514345081 has 2 divisors, whose sum is σ = 15514345082. Its totient is φ = 15514345080.

The previous prime is 15514345079. The next prime is 15514345123. The reversal of 15514345081 is 18054341551.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 7798479481 + 7715865600 = 88309^2 + 87840^2 .

It is a cyclic number.

It is not a de Polignac number, because 15514345081 - 2¹ = 15514345079 is a prime.

It is a super-2 number, since 2×15514345081² (a number of 21 digits) contains 22 as substring.

Together with 15514345079, it forms a pair of twin primes.

It is a self number, because there is not a number n which added to its sum of digits gives 15514345081.

It is not a weakly prime, because it can be changed into another prime (15514345031) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7757172540 + 7757172541.

It is an arithmetic number, because the mean of its divisors is an integer number (7757172541).

Almost surely, 2^15514345081 is an apocalyptic number.

It is an amenable number.

15514345081 is a deficient number, since it is larger than the sum of its proper divisors (1).

15514345081 is an equidigital number, since it uses as much as digits as its factorization.

15514345081 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 48000, while the sum is 37.

The spelling of 15514345081 in words is "fifteen billion, five hundred fourteen million, three hundred forty-five thousand, eighty-one".