2152105706551 has 4 divisors (see below), whose sum is σ = 2152121716504. Its totient is φ = 2152089696600.

The previous prime is 2152105706519. The next prime is 2152105706629. The reversal of 2152105706551 is 1556075012512.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 2152105706551 - 2⁵ = 2152105706519 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2152105736551) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7801620 + ... + 8072761.

It is an arithmetic number, because the mean of its divisors is an integer number (538030429126).

Almost surely, 2^{2152105706551} is an apocalyptic number.

2152105706551 is a deficient number, since it is larger than the sum of its proper divisors (16009953).

2152105706551 is a wasteful number, since it uses less digits than its factorization.

2152105706551 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16009952.

The product of its (nonzero) digits is 105000, while the sum is 40.

The spelling of 2152105706551 in words is "two trillion, one hundred fifty-two billion, one hundred five million, seven hundred six thousand, five hundred fifty-one".