321040651 has 2 divisors, whose sum is σ = 321040652. Its totient is φ = 321040650.

The previous prime is 321040613. The next prime is 321040669. The reversal of 321040651 is 156040123.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 321040651 - 2¹⁹ = 320516363 is a prime.

It is not a weakly prime, because it can be changed into another prime (321040151) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 160520325 + 160520326.

It is an arithmetic number, because the mean of its divisors is an integer number (160520326).

Almost surely, 2^321040651 is an apocalyptic number.

321040651 is a deficient number, since it is larger than the sum of its proper divisors (1).

321040651 is an equidigital number, since it uses as much as digits as its factorization.

321040651 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 720, while the sum is 22.

The square root of 321040651 is about 17917.6072900374. The cubic root of 321040651 is about 684.7310297835.

Adding to 321040651 its reverse (156040123), we get a palindrome (477080774).

The spelling of 321040651 in words is "three hundred twenty-one million, forty thousand, six hundred fifty-one".