2151784871512 has 32 divisors (see below), whose sum is σ = 4178175422400. Its totient is φ = 1037683954944.

The previous prime is 2151784871501. The next prime is 2151784871539.

2151784871512 is nontrivially palindromic in base 10.

It is a super-2 number, since 2×2151784871512² (a number of 25 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 2151784871512.

It is a congruent 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, 4731888 + ... + 5166655.

It is an arithmetic number, because the mean of its divisors is an integer number (130567981950).

Almost surely, 2^{2151784871512} is an apocalyptic number.

It is an amenable number.

2151784871512 is a deficient number, since it is larger than the sum of its proper divisors (2026390550888).

2151784871512 is a wasteful number, since it uses less digits than its factorization.

2151784871512 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9899515 (or 9899511 counting only the distinct ones).

The product of its digits is 1254400, while the sum is 52.

The spelling of 2151784871512 in words is "two trillion, one hundred fifty-one billion, seven hundred eighty-four million, eight hundred seventy-one thousand, five hundred twelve".