53033309 has 4 divisors (see below), whose sum is σ = 60609504. Its totient is φ = 45457116.

The previous prime is 53033303. The next prime is 53033311. The reversal of 53033309 is 90333035.

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 53033309 - 2¹² = 53029213 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (53033303) 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, 3788087 + ... + 3788100.

It is an arithmetic number, because the mean of its divisors is an integer number (15152376).

Almost surely, 2^53033309 is an apocalyptic number.

It is an amenable number.

53033309 is a deficient number, since it is larger than the sum of its proper divisors (7576195).

53033309 is an equidigital number, since it uses as much as digits as its factorization.

53033309 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7576194.

The product of its (nonzero) digits is 3645, while the sum is 26.

The square root of 53033309 is about 7282.3972014715. The cubic root of 53033309 is about 375.7072495858.

The spelling of 53033309 in words is "fifty-three million, thirty-three thousand, three hundred nine".