2151575045651 has 4 divisors (see below), whose sum is σ = 2151629750400. Its totient is φ = 2151520340904.

The previous prime is 2151575045647. The next prime is 2151575045713. The reversal of 2151575045651 is 1565405751512.

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 2151575045651 - 2² = 2151575045647 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2151575045596 and 2151575045605.

It is not an unprimeable number, because it can be changed into a prime (2151575075651) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 27293336 + ... + 27372053.

It is an arithmetic number, because the mean of its divisors is an integer number (537907437600).

Almost surely, 2^{2151575045651} is an apocalyptic number.

2151575045651 is a deficient number, since it is larger than the sum of its proper divisors (54704749).

2151575045651 is an equidigital number, since it uses as much as digits as its factorization.

2151575045651 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 54704748.

The product of its (nonzero) digits is 1050000, while the sum is 47.

The spelling of 2151575045651 in words is "two trillion, one hundred fifty-one billion, five hundred seventy-five million, forty-five thousand, six hundred fifty-one".