1513025641 has 2 divisors, whose sum is σ = 1513025642. Its totient is φ = 1513025640.

The previous prime is 1513025627. The next prime is 1513025669. The reversal of 1513025641 is 1465203151.

It is an a-pointer prime, because the next prime (1513025669) can be obtained adding 1513025641 to its sum of digits (28).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1511654400 + 1371241 = 38880^2 + 1171^2 .

It is an emirp because it is prime and its reverse (1465203151) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1513025641 - 2⁷ = 1513025513 is a prime.

1513025641 is a modest number, since divided by 25641 gives 1513 as remainder.

It is not a weakly prime, because it can be changed into another prime (1513025611) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 756512820 + 756512821.

It is an arithmetic number, because the mean of its divisors is an integer number (756512821).

Almost surely, 2^1513025641 is an apocalyptic number.

It is an amenable number.

1513025641 is a deficient number, since it is larger than the sum of its proper divisors (1).

1513025641 is an equidigital number, since it uses as much as digits as its factorization.

1513025641 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3600, while the sum is 28.

The square root of 1513025641 is about 38897.6302748638. The cubic root of 1513025641 is about 1148.0181722550.

Adding to 1513025641 its reverse (1465203151), we get a palindrome (2978228792).

The spelling of 1513025641 in words is "one billion, five hundred thirteen million, twenty-five thousand, six hundred forty-one".