1000312155 has 24 divisors (see below), whose sum is σ = 1744930512. Its totient is φ = 530097984.

The previous prime is 1000312129. The next prime is 1000312177. The reversal of 1000312155 is 5512130001.

It is not a de Polignac number, because 1000312155 - 2⁸ = 1000311899 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 63729 + ... + 77858.

It is an arithmetic number, because the mean of its divisors is an integer number (72705438).

Almost surely, 2^1000312155 is an apocalyptic number.

1000312155 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

1000312155 is a deficient number, since it is larger than the sum of its proper divisors (744618357).

1000312155 is a wasteful number, since it uses less digits than its factorization.

1000312155 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 141755 (or 141752 counting only the distinct ones).

The product of its (nonzero) digits is 150, while the sum is 18.

The square root of 1000312155 is about 31627.7118204906. The cubic root of 1000312155 is about 1000.1040408418.

Adding to 1000312155 its reverse (5512130001), we get a palindrome (6512442156).

The spelling of 1000312155 in words is "one billion, three hundred twelve thousand, one hundred fifty-five".