321201431 has 4 divisors (see below), whose sum is σ = 328035552. Its totient is φ = 314367312.

The previous prime is 321201409. The next prime is 321201449. The reversal of 321201431 is 134102123.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 321201431 - 2⁶ = 321201367 is a prime.

It is a super-2 number, since 2×321201431² = 206340718552895522, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (321201131) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3416990 + ... + 3417083.

It is an arithmetic number, because the mean of its divisors is an integer number (82008888).

Almost surely, 2^321201431 is an apocalyptic number.

321201431 is a deficient number, since it is larger than the sum of its proper divisors (6834121).

321201431 is an equidigital number, since it uses as much as digits as its factorization.

321201431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6834120.

The product of its (nonzero) digits is 144, while the sum is 17.

The square root of 321201431 is about 17922.0933766120. The cubic root of 321201431 is about 684.8453171607.

Adding to 321201431 its reverse (134102123), we get a palindrome (455303554).

The spelling of 321201431 in words is "three hundred twenty-one million, two hundred one thousand, four hundred thirty-one".