321432253 has 4 divisors (see below), whose sum is σ = 338349760. Its totient is φ = 304514748.

The previous prime is 321432233. The next prime is 321432257. The reversal of 321432253 is 352234123.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 352234123 = 5857 ⋅60139.

It is not a de Polignac number, because 321432253 - 2¹⁷ = 321301181 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (321432257) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8458725 + ... + 8458762.

It is an arithmetic number, because the mean of its divisors is an integer number (84587440).

Almost surely, 2^321432253 is an apocalyptic number.

It is an amenable number.

321432253 is a deficient number, since it is larger than the sum of its proper divisors (16917507).

321432253 is a wasteful number, since it uses less digits than its factorization.

321432253 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16917506.

The product of its digits is 4320, while the sum is 25.

The square root of 321432253 is about 17928.5318138435. The cubic root of 321432253 is about 685.0093258893.

Adding to 321432253 its reverse (352234123), we get a palindrome (673666376).

The spelling of 321432253 in words is "three hundred twenty-one million, four hundred thirty-two thousand, two hundred fifty-three".