324156432421 has 2 divisors, whose sum is σ = 324156432422. Its totient is φ = 324156432420.

The previous prime is 324156432407. The next prime is 324156432487. The reversal of 324156432421 is 124234651423.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 259111540900 + 65044891521 = 509030^2 + 255039^2 .

It is a cyclic number.

It is not a de Polignac number, because 324156432421 - 2¹¹ = 324156430373 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (324156432401) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 162078216210 + 162078216211.

It is an arithmetic number, because the mean of its divisors is an integer number (162078216211).

Almost surely, 2^324156432421 is an apocalyptic number.

It is an amenable number.

324156432421 is a deficient number, since it is larger than the sum of its proper divisors (1).

324156432421 is an equidigital number, since it uses as much as digits as its factorization.

324156432421 is an evil number, because the sum of its binary digits is even.

The product of its digits is 138240, while the sum is 37.

The spelling of 324156432421 in words is "three hundred twenty-four billion, one hundred fifty-six million, four hundred thirty-two thousand, four hundred twenty-one".