53021317 has 4 divisors (see below), whose sum is σ = 56140236. Its totient is φ = 49902400.

The previous prime is 53021303. The next prime is 53021327. The reversal of 53021317 is 71312035.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 45887076 + 7134241 = 6774^2 + 2671^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-53021317 is a prime.

It is a super-2 number, since 2×53021317² = 5622520112828978, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (53021327) 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, 1559434 + ... + 1559467.

It is an arithmetic number, because the mean of its divisors is an integer number (14035059).

Almost surely, 2^53021317 is an apocalyptic number.

It is an amenable number.

53021317 is a deficient number, since it is larger than the sum of its proper divisors (3118919).

53021317 is a wasteful number, since it uses less digits than its factorization.

53021317 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3118918.

The product of its (nonzero) digits is 630, while the sum is 22.

The square root of 53021317 is about 7281.5737996672. The cubic root of 53021317 is about 375.6789288879.

The spelling of 53021317 in words is "fifty-three million, twenty-one thousand, three hundred seventeen".