3216421577 has 2 divisors, whose sum is σ = 3216421578. Its totient is φ = 3216421576.

The previous prime is 3216421553. The next prime is 3216421589. The reversal of 3216421577 is 7751246123.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2064430096 + 1151991481 = 45436^2 + 33941^2 .

It is a cyclic number.

It is not a de Polignac number, because 3216421577 - 2⁸ = 3216421321 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 3216421577.

It is not a weakly prime, because it can be changed into another prime (3216421597) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1608210788 + 1608210789.

It is an arithmetic number, because the mean of its divisors is an integer number (1608210789).

Almost surely, 2^3216421577 is an apocalyptic number.

It is an amenable number.

3216421577 is a deficient number, since it is larger than the sum of its proper divisors (1).

3216421577 is an equidigital number, since it uses as much as digits as its factorization.

3216421577 is an evil number, because the sum of its binary digits is even.

The product of its digits is 70560, while the sum is 38.

The square root of 3216421577 is about 56713.5043618361. The cubic root of 3216421577 is about 1476.1290334104.

The spelling of 3216421577 in words is "three billion, two hundred sixteen million, four hundred twenty-one thousand, five hundred seventy-seven".