53214321 has 16 divisors (see below), whose sum is σ = 74178560. Its totient is φ = 33892560.

The previous prime is 53214311. The next prime is 53214331. The reversal of 53214321 is 12341235.

It is an interprime number because it is at equal distance from previous prime (53214311) and next prime (53214331).

It is not a de Polignac number, because 53214321 - 2¹⁰ = 53213297 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (53214311) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3726 + ... + 10968.

It is an arithmetic number, because the mean of its divisors is an integer number (4636160).

Almost surely, 2^53214321 is an apocalyptic number.

It is an amenable number.

53214321 is a deficient number, since it is larger than the sum of its proper divisors (20964239).

53214321 is a wasteful number, since it uses less digits than its factorization.

53214321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7356.

The product of its digits is 720, while the sum is 21.

The square root of 53214321 is about 7294.8146652263. The cubic root of 53214321 is about 376.1342157979.

Adding to 53214321 its reverse (12341235), we get a palindrome (65555556).

It can be divided in two parts, 53214 and 321, that added together give a palindrome (53535).

The spelling of 53214321 in words is "fifty-three million, two hundred fourteen thousand, three hundred twenty-one".