1352918221 has 2 divisors, whose sum is σ = 1352918222. Its totient is φ = 1352918220.

The previous prime is 1352918201. The next prime is 1352918249. The reversal of 1352918221 is 1228192531.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1269853225 + 83064996 = 35635^2 + 9114^2 .

It is a cyclic number.

It is not a de Polignac number, because 1352918221 - 2²⁷ = 1218700493 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1352918201) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 676459110 + 676459111.

It is an arithmetic number, because the mean of its divisors is an integer number (676459111).

Almost surely, 2^1352918221 is an apocalyptic number.

It is an amenable number.

1352918221 is a deficient number, since it is larger than the sum of its proper divisors (1).

1352918221 is an equidigital number, since it uses as much as digits as its factorization.

1352918221 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 8640, while the sum is 34.

The square root of 1352918221 is about 36782.0366619359. The cubic root of 1352918221 is about 1106.0052333617.

The spelling of 1352918221 in words is "one billion, three hundred fifty-two million, nine hundred eighteen thousand, two hundred twenty-one".