1555224081 has 8 divisors (see below), whose sum is σ = 2182770720. Its totient is φ = 982246752.

The previous prime is 1555224079. The next prime is 1555224091. The reversal of 1555224081 is 1804225551.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1555224081 - 2¹ = 1555224079 is a prime.

It is a super-2 number, since 2×1555224081² = 4837443884244589122, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1555224091) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13642260 + ... + 13642373.

It is an arithmetic number, because the mean of its divisors is an integer number (272846340).

Almost surely, 2^1555224081 is an apocalyptic number.

It is an amenable number.

1555224081 is a deficient number, since it is larger than the sum of its proper divisors (627546639).

1555224081 is a wasteful number, since it uses less digits than its factorization.

1555224081 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27284655.

The product of its (nonzero) digits is 16000, while the sum is 33.

The square root of 1555224081 is about 39436.3294564796. The cubic root of 1555224081 is about 1158.5932414213.

The spelling of 1555224081 in words is "one billion, five hundred fifty-five million, two hundred twenty-four thousand, eighty-one".