5415512521 has 2 divisors, whose sum is σ = 5415512522. Its totient is φ = 5415512520.

The previous prime is 5415512513. The next prime is 5415512527. The reversal of 5415512521 is 1252155145.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 3616819600 + 1798692921 = 60140^2 + 42411^2 .

It is a cyclic number.

It is not a de Polignac number, because 5415512521 - 2³ = 5415512513 is a prime.

It is not a weakly prime, because it can be changed into another prime (5415512527) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2707756260 + 2707756261.

It is an arithmetic number, because the mean of its divisors is an integer number (2707756261).

Almost surely, 2^5415512521 is an apocalyptic number.

It is an amenable number.

5415512521 is a deficient number, since it is larger than the sum of its proper divisors (1).

5415512521 is an equidigital number, since it uses as much as digits as its factorization.

5415512521 is an evil number, because the sum of its binary digits is even.

The product of its digits is 10000, while the sum is 31.

The square root of 5415512521 is about 73590.1659258899. The cubic root of 5415512521 is about 1756.0889955855.

Adding to 5415512521 its reverse (1252155145), we get a palindrome (6667667666).

The spelling of 5415512521 in words is "five billion, four hundred fifteen million, five hundred twelve thousand, five hundred twenty-one".