2150651561 has 8 divisors (see below), whose sum is σ = 2162884680. Its totient is φ = 2138432128.

The previous prime is 2150651549. The next prime is 2150651599. The reversal of 2150651561 is 1651560512.

It can be written as a sum of positive squares in 4 ways, for example, as 531072025 + 1619579536 = 23045^2 + 40244^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 2150651561 - 2¹⁴ = 2150635177 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2150351561) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 583055 + ... + 586731.

It is an arithmetic number, because the mean of its divisors is an integer number (270360585).

Almost surely, 2^2150651561 is an apocalyptic number.

It is an amenable number.

2150651561 is a deficient number, since it is larger than the sum of its proper divisors (12233119).

2150651561 is a wasteful number, since it uses less digits than its factorization.

2150651561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6843.

The product of its (nonzero) digits is 9000, while the sum is 32.

The square root of 2150651561 is about 46375.1179082059. The cubic root of 2150651561 is about 1290.7932466681.

The spelling of 2150651561 in words is "two billion, one hundred fifty million, six hundred fifty-one thousand, five hundred sixty-one".