2051257513 has 2 divisors, whose sum is σ = 2051257514. Its totient is φ = 2051257512.

The previous prime is 2051257489. The next prime is 2051257529. The reversal of 2051257513 is 3157521502.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1463292009 + 587965504 = 38253^2 + 24248^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2051257513 is a prime.

It is not a weakly prime, because it can be changed into another prime (2051257913) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1025628756 + 1025628757.

It is an arithmetic number, because the mean of its divisors is an integer number (1025628757).

Almost surely, 2^2051257513 is an apocalyptic number.

It is an amenable number.

2051257513 is a deficient number, since it is larger than the sum of its proper divisors (1).

2051257513 is an equidigital number, since it uses as much as digits as its factorization.

2051257513 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 10500, while the sum is 31.

The square root of 2051257513 is about 45290.8104696748. The cubic root of 2051257513 is about 1270.5937895381.

The spelling of 2051257513 in words is "two billion, fifty-one million, two hundred fifty-seven thousand, five hundred thirteen".