1313450521 has 2 divisors, whose sum is σ = 1313450522. Its totient is φ = 1313450520.

The previous prime is 1313450503. The next prime is 1313450527. The reversal of 1313450521 is 1250543131.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1267360000 + 46090521 = 35600^2 + 6789^2 .

It is a cyclic number.

It is not a de Polignac number, because 1313450521 - 2⁷ = 1313450393 is a prime.

It is a super-2 number, since 2×1313450521² = 3450304542230342882, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1313450527) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 656725260 + 656725261.

It is an arithmetic number, because the mean of its divisors is an integer number (656725261).

Almost surely, 2^1313450521 is an apocalyptic number.

It is an amenable number.

1313450521 is a deficient number, since it is larger than the sum of its proper divisors (1).

1313450521 is an equidigital number, since it uses as much as digits as its factorization.

1313450521 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1800, while the sum is 25.

The square root of 1313450521 is about 36241.5579273298. The cubic root of 1313450521 is about 1095.1440275372.

Adding to 1313450521 its reverse (1250543131), we get a palindrome (2563993652).

The spelling of 1313450521 in words is "one billion, three hundred thirteen million, four hundred fifty thousand, five hundred twenty-one".