53021213 has 8 divisors (see below), whose sum is σ = 60947328. Its totient is φ = 45183024.

The previous prime is 53021201. The next prime is 53021219. The reversal of 53021213 is 31212035.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 53021213 - 2¹⁰ = 53020189 is a prime.

It is a super-2 number, since 2×53021213² = 5622498055982738, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 53021191 and 53021200.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (53021219) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 20681 + ... + 23102.

It is an arithmetic number, because the mean of its divisors is an integer number (7618416).

Almost surely, 2^53021213 is an apocalyptic number.

It is an amenable number.

53021213 is a deficient number, since it is larger than the sum of its proper divisors (7926115).

53021213 is a wasteful number, since it uses less digits than its factorization.

53021213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43963.

The product of its (nonzero) digits is 180, while the sum is 17.

The square root of 53021213 is about 7281.5666583504. The cubic root of 53021213 is about 375.6786832594.

Adding to 53021213 its reverse (31212035), we get a palindrome (84233248).

The spelling of 53021213 in words is "fifty-three million, twenty-one thousand, two hundred thirteen".