321470431 has 2 divisors, whose sum is σ = 321470432. Its totient is φ = 321470430.

The previous prime is 321470419. The next prime is 321470483. The reversal of 321470431 is 134074123.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-321470431 is a prime.

It is a super-2 number, since 2×321470431² = 206686476014651522, which contains 22 as substring.

It is equal to p_17350252 and since 321470431 and 17350252 have the same sum of digits, it is a Honaker prime.

It is a junction number, because it is equal to n+sod(n) for n = 321470396 and 321470405.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (321473431) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 160735215 + 160735216.

It is an arithmetic number, because the mean of its divisors is an integer number (160735216).

Almost surely, 2^321470431 is an apocalyptic number.

321470431 is a deficient number, since it is larger than the sum of its proper divisors (1).

321470431 is an equidigital number, since it uses as much as digits as its factorization.

321470431 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2016, while the sum is 25.

The square root of 321470431 is about 17929.5965096820. The cubic root of 321470431 is about 685.0364453943.

The spelling of 321470431 in words is "three hundred twenty-one million, four hundred seventy thousand, four hundred thirty-one".