1040221555 has 8 divisors (see below), whose sum is σ = 1256217552. Its totient is φ = 826876128.

The previous prime is 1040221543. The next prime is 1040221577. The reversal of 1040221555 is 5551220401.

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

It is a cyclic number.

It is not a de Polignac number, because 1040221555 - 2⁹ = 1040221043 is a prime.

It is a Duffinian number.

It is an unprimeable number.

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 in 7 ways as a sum of consecutive naturals, for example, 661777 + ... + 663346.

It is an arithmetic number, because the mean of its divisors is an integer number (157027194).

Almost surely, 2^1040221555 is an apocalyptic number.

1040221555 is a deficient number, since it is larger than the sum of its proper divisors (215995997).

1040221555 is a wasteful number, since it uses less digits than its factorization.

1040221555 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1325285.

The product of its (nonzero) digits is 2000, while the sum is 25.

The square root of 1040221555 is about 32252.4658747203. The cubic root of 1040221555 is about 1013.2313443951.

Adding to 1040221555 its reverse (5551220401), we get a palindrome (6591441956).

The spelling of 1040221555 in words is "one billion, forty million, two hundred twenty-one thousand, five hundred fifty-five".