2151822761 has 8 divisors (see below), whose sum is σ = 2397389184. Its totient is φ = 1914580720.

The previous prime is 2151822703. The next prime is 2151822767. The reversal of 2151822761 is 1672281512.

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

It is not a de Polignac number, because 2151822761 - 2⁶ = 2151822697 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2151822767) 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, 2080550 + ... + 2081583.

It is an arithmetic number, because the mean of its divisors is an integer number (299673648).

Almost surely, 2^2151822761 is an apocalyptic number.

It is an amenable number.

2151822761 is a deficient number, since it is larger than the sum of its proper divisors (245566423).

2151822761 is a wasteful number, since it uses less digits than its factorization.

2151822761 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4162191.

The product of its digits is 13440, while the sum is 35.

The square root of 2151822761 is about 46387.7436506670. The cubic root of 2151822761 is about 1291.0275171768.

The spelling of 2151822761 in words is "two billion, one hundred fifty-one million, eight hundred twenty-two thousand, seven hundred sixty-one".