53303513 has 4 divisors (see below), whose sum is σ = 53945808. Its totient is φ = 52661220.

The previous prime is 53303501. The next prime is 53303557. The reversal of 53303513 is 31530335.

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 a cyclic number.

It is not a de Polignac number, because 53303513 - 2¹⁰ = 53302489 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (53303713) 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, 321023 + ... + 321188.

It is an arithmetic number, because the mean of its divisors is an integer number (13486452).

Almost surely, 2^53303513 is an apocalyptic number.

It is an amenable number.

53303513 is a deficient number, since it is larger than the sum of its proper divisors (642295).

53303513 is an equidigital number, since it uses as much as digits as its factorization.

53303513 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 642294.

The product of its (nonzero) digits is 2025, while the sum is 23.

The square root of 53303513 is about 7300.9254892787. The cubic root of 53303513 is about 376.3442434529.

Adding to 53303513 its reverse (31530335), we get a palindrome (84833848).

The spelling of 53303513 in words is "fifty-three million, three hundred three thousand, five hundred thirteen".