2215920 has 80 divisors (see below), whose sum is σ = 7856640. Its totient is φ = 506112.

The previous prime is 2215903. The next prime is 2215921. The reversal of 2215920 is 295122.

2215920 is nontrivially palindromic in base 13.

It is a tau number, because it is divible by the number of its divisors (80).

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2215921) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1021 + ... + 2339.

It is an arithmetic number, because the mean of its divisors is an integer number (98208).

2^2215920 is an apocalyptic number.

2215920 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2215920, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3928320).

2215920 is an abundant number, since it is smaller than the sum of its proper divisors (5640720).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2215920 is a wasteful number, since it uses less digits than its factorization.

2215920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1342 (or 1336 counting only the distinct ones).

The product of its (nonzero) digits is 360, while the sum is 21.

The square root of 2215920 is about 1488.5966545710. The cubic root of 2215920 is about 130.3721094076.

The spelling of 2215920 in words is "two million, two hundred fifteen thousand, nine hundred twenty".