2215761 has 8 divisors (see below), whose sum is σ = 3109920. Its totient is φ = 1399392.

The previous prime is 2215699. The next prime is 2215777. The reversal of 2215761 is 1675122.

2215761 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is not a de Polignac number, because 2215761 - 2¹⁴ = 2199377 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2215561) 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, 19380 + ... + 19493.

It is an arithmetic number, because the mean of its divisors is an integer number (388740).

2^2215761 is an apocalyptic number.

It is an amenable number.

2215761 is a deficient number, since it is larger than the sum of its proper divisors (894159).

2215761 is a wasteful number, since it uses less digits than its factorization.

2215761 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38895.

The product of its digits is 840, while the sum is 24.

The square root of 2215761 is about 1488.5432476082. The cubic root of 2215761 is about 130.3689911149.

The spelling of 2215761 in words is "two million, two hundred fifteen thousand, seven hundred sixty-one".