1662215441 has 2 divisors, whose sum is σ = 1662215442. Its totient is φ = 1662215440.

The previous prime is 1662215419. The next prime is 1662215449. The reversal of 1662215441 is 1445122661.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1505440000 + 156775441 = 38800^2 + 12521^2 .

It is a cyclic number.

It is not a de Polignac number, because 1662215441 - 2¹⁰ = 1662214417 is a prime.

It is a super-3 number, since 3×1662215441³ (a number of 29 digits) contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1662215398 and 1662215407.

It is not a weakly prime, because it can be changed into another prime (1662215449) 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, 831107720 + 831107721.

It is an arithmetic number, because the mean of its divisors is an integer number (831107721).

Almost surely, 2^1662215441 is an apocalyptic number.

It is an amenable number.

1662215441 is a deficient number, since it is larger than the sum of its proper divisors (1).

1662215441 is an equidigital number, since it uses as much as digits as its factorization.

1662215441 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 11520, while the sum is 32.

The square root of 1662215441 is about 40770.2764400733. The cubic root of 1662215441 is about 1184.5746581262.

The spelling of 1662215441 in words is "one billion, six hundred sixty-two million, two hundred fifteen thousand, four hundred forty-one".