1642215559 has 2 divisors, whose sum is σ = 1642215560. Its totient is φ = 1642215558.

The previous prime is 1642215557. The next prime is 1642215593. The reversal of 1642215559 is 9555122461.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1642215559 - 2¹ = 1642215557 is a prime.

Together with 1642215557, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1642215551) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 821107779 + 821107780.

It is an arithmetic number, because the mean of its divisors is an integer number (821107780).

Almost surely, 2^1642215559 is an apocalyptic number.

1642215559 is a deficient number, since it is larger than the sum of its proper divisors (1).

1642215559 is an equidigital number, since it uses as much as digits as its factorization.

1642215559 is an evil number, because the sum of its binary digits is even.

The product of its digits is 108000, while the sum is 40.

The square root of 1642215559 is about 40524.2588951359. The cubic root of 1642215559 is about 1179.8045158790.

The spelling of 1642215559 in words is "one billion, six hundred forty-two million, two hundred fifteen thousand, five hundred fifty-nine".