1001551512 has 32 divisors (see below), whose sum is σ = 2696485680. Its totient is φ = 308169600.

The previous prime is 1001551487. The next prime is 1001551517. The reversal of 1001551512 is 2151551001.

It is a super-2 number, since 2×1001551512² = 2006210862378972288, which contains 22 as substring.

It is a Smith number, since the sum of its digits (21) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1001551517) 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 7 ways as a sum of consecutive naturals, for example, 1604739 + ... + 1605362.

Almost surely, 2^1001551512 is an apocalyptic number.

1001551512 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1001551512 is an abundant number, since it is smaller than the sum of its proper divisors (1694934168).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1001551512 is a wasteful number, since it uses less digits than its factorization.

1001551512 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3210123 (or 3210119 counting only the distinct ones).

The product of its (nonzero) digits is 250, while the sum is 21.

The square root of 1001551512 is about 31647.2986524917. The cubic root of 1001551512 is about 1000.5169034315.

The spelling of 1001551512 in words is "one billion, one million, five hundred fifty-one thousand, five hundred twelve".