1355221499 has 2 divisors, whose sum is σ = 1355221500. Its totient is φ = 1355221498.

The previous prime is 1355221477. The next prime is 1355221519. The reversal of 1355221499 is 9941225531.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1355221499 - 2²⁰ = 1354172923 is a prime.

It is a super-2 number, since 2×1355221499² = 3673250622703614002, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1355221999) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 677610749 + 677610750.

It is an arithmetic number, because the mean of its divisors is an integer number (677610750).

Almost surely, 2^1355221499 is an apocalyptic number.

1355221499 is a deficient number, since it is larger than the sum of its proper divisors (1).

1355221499 is an equidigital number, since it uses as much as digits as its factorization.

1355221499 is an evil number, because the sum of its binary digits is even.

The product of its digits is 97200, while the sum is 41.

The square root of 1355221499 is about 36813.3331688398. Note that the first 3 decimals coincide. The cubic root of 1355221499 is about 1106.6325177060.

The spelling of 1355221499 in words is "one billion, three hundred fifty-five million, two hundred twenty-one thousand, four hundred ninety-nine".