15524131481 has 2 divisors, whose sum is σ = 15524131482. Its totient is φ = 15524131480.

The previous prime is 15524131471. The next prime is 15524131523. The reversal of 15524131481 is 18413142551.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 8146867600 + 7377263881 = 90260^2 + 85891^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-15524131481 is a prime.

It is a super-2 number, since 2×15524131481² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (15524131411) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7762065740 + 7762065741.

It is an arithmetic number, because the mean of its divisors is an integer number (7762065741).

Almost surely, 2^15524131481 is an apocalyptic number.

It is an amenable number.

15524131481 is a deficient number, since it is larger than the sum of its proper divisors (1).

15524131481 is an equidigital number, since it uses as much as digits as its factorization.

15524131481 is an evil number, because the sum of its binary digits is even.

The product of its digits is 19200, while the sum is 35.

The spelling of 15524131481 in words is "fifteen billion, five hundred twenty-four million, one hundred thirty-one thousand, four hundred eighty-one".