53132321 has 16 divisors (see below), whose sum is σ = 60341760. Its totient is φ = 46341120.

The previous prime is 53132257. The next prime is 53132347. The reversal of 53132321 is 12323135.

It is a cyclic number.

It is not a de Polignac number, because 53132321 - 2⁶ = 53132257 is a prime.

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 = 53132293 and 53132302.

It is not an unprimeable number, because it can be changed into a prime (53132381) 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, 61136 + ... + 61998.

It is an arithmetic number, because the mean of its divisors is an integer number (3771360).

Almost surely, 2^53132321 is an apocalyptic number.

It is an amenable number.

53132321 is a deficient number, since it is larger than the sum of its proper divisors (7209439).

53132321 is a wasteful number, since it uses less digits than its factorization.

53132321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1096.

The product of its digits is 540, while the sum is 20.

The square root of 53132321 is about 7289.1920677123. The cubic root of 53132321 is about 375.9409165689.

Adding to 53132321 its reverse (12323135), we get a palindrome (65455456).

The spelling of 53132321 in words is "fifty-three million, one hundred thirty-two thousand, three hundred twenty-one".