53616321 has 12 divisors (see below), whose sum is σ = 84486480. Its totient is φ = 32494680.

The previous prime is 53616319. The next prime is 53616323. The reversal of 53616321 is 12361635.

It is an interprime number because it is at equal distance from previous prime (53616319) and next prime (53616323).

It is not a de Polignac number, because 53616321 - 2¹ = 53616319 is a prime.

It is not an unprimeable number, because it can be changed into a prime (53616323) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 270691 + ... + 270888.

It is an arithmetic number, because the mean of its divisors is an integer number (7040540).

Almost surely, 2^53616321 is an apocalyptic number.

It is an amenable number.

53616321 is a deficient number, since it is larger than the sum of its proper divisors (30870159).

53616321 is a wasteful number, since it uses less digits than its factorization.

53616321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 541596 (or 541593 counting only the distinct ones).

The product of its digits is 3240, while the sum is 27.

The square root of 53616321 is about 7322.3166416101. The cubic root of 53616321 is about 377.0789914853.

Adding to 53616321 its reverse (12361635), we get a palindrome (65977956).

The spelling of 53616321 in words is "fifty-three million, six hundred sixteen thousand, three hundred twenty-one".