1555133199 has 16 divisors (see below), whose sum is σ = 2143139808. Its totient is φ = 1002298752.

The previous prime is 1555133171. The next prime is 1555133219. The reversal of 1555133199 is 9913315551.

It is not a de Polignac number, because 1555133199 - 2¹⁵ = 1555100431 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1555133199.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1555133119) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 27192 + ... + 62045.

It is an arithmetic number, because the mean of its divisors is an integer number (133946238).

Almost surely, 2^1555133199 is an apocalyptic number.

1555133199 is a deficient number, since it is larger than the sum of its proper divisors (588006609).

1555133199 is a wasteful number, since it uses less digits than its factorization.

1555133199 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 89434.

The product of its digits is 91125, while the sum is 42.

The square root of 1555133199 is about 39435.1771772361. The cubic root of 1555133199 is about 1158.5706729003.

The spelling of 1555133199 in words is "one billion, five hundred fifty-five million, one hundred thirty-three thousand, one hundred ninety-nine".