321415057 has 2 divisors, whose sum is σ = 321415058. Its totient is φ = 321415056.

The previous prime is 321415051. The next prime is 321415103. The reversal of 321415057 is 750514123.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 298909521 + 22505536 = 17289^2 + 4744^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-321415057 is a prime.

It is not a weakly prime, because it can be changed into another prime (321415051) 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 as a sum of consecutive naturals, namely, 160707528 + 160707529.

It is an arithmetic number, because the mean of its divisors is an integer number (160707529).

Almost surely, 2^321415057 is an apocalyptic number.

It is an amenable number.

321415057 is a deficient number, since it is larger than the sum of its proper divisors (1).

321415057 is an equidigital number, since it uses as much as digits as its factorization.

321415057 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4200, while the sum is 28.

The square root of 321415057 is about 17928.0522366486. The cubic root of 321415057 is about 684.9971101162.

The spelling of 321415057 in words is "three hundred twenty-one million, four hundred fifteen thousand, fifty-seven".