1513011257 has 2 divisors, whose sum is σ = 1513011258. Its totient is φ = 1513011256.

The previous prime is 1513011217. The next prime is 1513011259. The reversal of 1513011257 is 7521103151.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1475789056 + 37222201 = 38416^2 + 6101^2 .

It is a cyclic number.

It is not a de Polignac number, because 1513011257 - 2¹² = 1513007161 is a prime.

Together with 1513011259, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (1513011259) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 756505628 + 756505629.

It is an arithmetic number, because the mean of its divisors is an integer number (756505629).

Almost surely, 2^1513011257 is an apocalyptic number.

It is an amenable number.

1513011257 is a deficient number, since it is larger than the sum of its proper divisors (1).

1513011257 is an equidigital number, since it uses as much as digits as its factorization.

1513011257 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1050, while the sum is 26.

The square root of 1513011257 is about 38897.4453788420. The cubic root of 1513011257 is about 1148.0145342586.

The spelling of 1513011257 in words is "one billion, five hundred thirteen million, eleven thousand, two hundred fifty-seven".