53311321 has 8 divisors (see below), whose sum is σ = 64134080. Its totient is φ = 43290288.

The previous prime is 53311259. The next prime is 53311373. The reversal of 53311321 is 12311335.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-53311321 is a prime.

It is a super-3 number, since 3×53311321³ (a number of 24 digits) contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (19).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (53311381) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 200286 + ... + 200551.

It is an arithmetic number, because the mean of its divisors is an integer number (8016760).

Almost surely, 2^53311321 is an apocalyptic number.

53311321 is the 4216-th hex number.

It is an amenable number.

53311321 is a deficient number, since it is larger than the sum of its proper divisors (10822759).

53311321 is a wasteful number, since it uses less digits than its factorization.

53311321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 400863.

The product of its digits is 270, while the sum is 19.

The square root of 53311321 is about 7301.4601964265. The cubic root of 53311321 is about 376.3626184293.

Adding to 53311321 its reverse (12311335), we get a palindrome (65622656).

The spelling of 53311321 in words is "fifty-three million, three hundred eleven thousand, three hundred twenty-one".