321145264387 has 2 divisors, whose sum is σ = 321145264388. Its totient is φ = 321145264386.

The previous prime is 321145264369. The next prime is 321145264393. The reversal of 321145264387 is 783462541123.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 321145264387 - 2⁷ = 321145264259 is a prime.

It is a super-2 number, since 2×321145264387² (a number of 24 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (321145264397) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 160572632193 + 160572632194.

It is an arithmetic number, because the mean of its divisors is an integer number (160572632194).

Almost surely, 2^321145264387 is an apocalyptic number.

321145264387 is a deficient number, since it is larger than the sum of its proper divisors (1).

321145264387 is an equidigital number, since it uses as much as digits as its factorization.

321145264387 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 967680, while the sum is 46.

The spelling of 321145264387 in words is "three hundred twenty-one billion, one hundred forty-five million, two hundred sixty-four thousand, three hundred eighty-seven".