1513054421 has 2 divisors, whose sum is σ = 1513054422. Its totient is φ = 1513054420.

The previous prime is 1513054399. The next prime is 1513054423. The reversal of 1513054421 is 1244503151.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1088076196 + 424978225 = 32986^2 + 20615^2 .

It is a cyclic number.

It is not a de Polignac number, because 1513054421 - 2³⁰ = 439312597 is a prime.

It is a Sophie Germain prime.

Together with 1513054423, it forms a pair of twin primes.

It is a Chen prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1513054423) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 756527210 + 756527211.

It is an arithmetic number, because the mean of its divisors is an integer number (756527211).

Almost surely, 2^1513054421 is an apocalyptic number.

It is an amenable number.

1513054421 is a deficient number, since it is larger than the sum of its proper divisors (1).

1513054421 is an equidigital number, since it uses as much as digits as its factorization.

1513054421 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2400, while the sum is 26.

The square root of 1513054421 is about 38898.0002185202. Note that the first 3 decimals coincide. The cubic root of 1513054421 is about 1148.0254512137.

Adding to 1513054421 its reverse (1244503151), we get a palindrome (2757557572).

The spelling of 1513054421 in words is "one billion, five hundred thirteen million, fifty-four thousand, four hundred twenty-one".