15515147027 has 2 divisors, whose sum is σ = 15515147028. Its totient is φ = 15515147026.

The previous prime is 15515146981. The next prime is 15515147029. The reversal of 15515147027 is 72074151551.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 15515147027 - 2⁶ = 15515146963 is a prime.

Together with 15515147029, 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 (15515147029) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7757573513 + 7757573514.

It is an arithmetic number, because the mean of its divisors is an integer number (7757573514).

Almost surely, 2^15515147027 is an apocalyptic number.

15515147027 is a deficient number, since it is larger than the sum of its proper divisors (1).

15515147027 is an equidigital number, since it uses as much as digits as its factorization.

15515147027 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 49000, while the sum is 38.

Adding to 15515147027 its reverse (72074151551), we get a palindrome (87589298578).

The spelling of 15515147027 in words is "fifteen billion, five hundred fifteen million, one hundred forty-seven thousand, twenty-seven".