253523335440513 has 4 divisors (see below), whose sum is σ = 338031113920688. Its totient is φ = 169015556960340.

The previous prime is 253523335440497. The next prime is 253523335440523. The reversal of 253523335440513 is 315044533325352.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 253523335440513 - 2⁴ = 253523335440497 is a prime.

It is a super-2 number, since 2×253523335440513² (a number of 30 digits) contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (253523335440523) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 42253889240083 + ... + 42253889240088.

It is an arithmetic number, because the mean of its divisors is an integer number (84507778480172).

Almost surely, 2^{253523335440513} is an apocalyptic number.

It is an amenable number.

253523335440513 is a deficient number, since it is larger than the sum of its proper divisors (84507778480175).

253523335440513 is an equidigital number, since it uses as much as digits as its factorization.

253523335440513 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 84507778480174.

The product of its (nonzero) digits is 9720000, while the sum is 48.

Adding to 253523335440513 its reverse (315044533325352), we get a palindrome (568567868765865).

The spelling of 253523335440513 in words is "two hundred fifty-three trillion, five hundred twenty-three billion, three hundred thirty-five million, four hundred forty thousand, five hundred thirteen".