1520236013 has 2 divisors, whose sum is σ = 1520236014. Its totient is φ = 1520236012.

The previous prime is 1520235989. The next prime is 1520236021. The reversal of 1520236013 is 3106320251.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1154776324 + 365459689 = 33982^2 + 19117^2 .

It is an emirp because it is prime and its reverse (3106320251) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1520236013 - 2²⁰ = 1519187437 is a prime.

It is a super-2 number, since 2×1520236013² = 4622235070444272338, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1520236013.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1520236073) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 760118006 + 760118007.

It is an arithmetic number, because the mean of its divisors is an integer number (760118007).

Almost surely, 2^1520236013 is an apocalyptic number.

It is an amenable number.

1520236013 is a deficient number, since it is larger than the sum of its proper divisors (1).

1520236013 is an equidigital number, since it uses as much as digits as its factorization.

1520236013 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1080, while the sum is 23.

The square root of 1520236013 is about 38990.2040646109. The cubic root of 1520236013 is about 1149.8389221147.

Adding to 1520236013 its reverse (3106320251), we get a palindrome (4626556264).

It can be divided in two parts, 15202 and 36013, that added together give a palindrome (51215).

The spelling of 1520236013 in words is "one billion, five hundred twenty million, two hundred thirty-six thousand, thirteen".