1000320155 has 8 divisors (see below), whose sum is σ = 1200554784. Its totient is φ = 800142400.

The previous prime is 1000320131. The next prime is 1000320169. The reversal of 1000320155 is 5510230001.

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

It is not a de Polignac number, because 1000320155 - 2¹² = 1000316059 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 56135 + ... + 71775.

It is an arithmetic number, because the mean of its divisors is an integer number (150069348).

Almost surely, 2^1000320155 is an apocalyptic number.

1000320155 is a deficient number, since it is larger than the sum of its proper divisors (200234629).

1000320155 is a wasteful number, since it uses less digits than its factorization.

1000320155 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28437.

The product of its (nonzero) digits is 150, while the sum is 17.

The square root of 1000320155 is about 31627.8382916063. The cubic root of 1000320155 is about 1000.1067069466.

Adding to 1000320155 its reverse (5510230001), we get a palindrome (6510550156).

The spelling of 1000320155 in words is "one billion, three hundred twenty thousand, one hundred fifty-five".