15240051521 has 2 divisors, whose sum is σ = 15240051522. Its totient is φ = 15240051520.

The previous prime is 15240051509. The next prime is 15240051539. The reversal of 15240051521 is 12515004251.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 14199343921 + 1040707600 = 119161^2 + 32260^2 .

It is a cyclic number.

It is not a de Polignac number, because 15240051521 - 2⁶ = 15240051457 is a prime.

It is not a weakly prime, because it can be changed into another prime (15240059521) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7620025760 + 7620025761.

It is an arithmetic number, because the mean of its divisors is an integer number (7620025761).

Almost surely, 2^15240051521 is an apocalyptic number.

It is an amenable number.

15240051521 is a deficient number, since it is larger than the sum of its proper divisors (1).

15240051521 is an equidigital number, since it uses as much as digits as its factorization.

15240051521 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2000, while the sum is 26.

Adding to 15240051521 its reverse (12515004251), we get a palindrome (27755055772).

The spelling of 15240051521 in words is "fifteen billion, two hundred forty million, fifty-one thousand, five hundred twenty-one".