2219540 has 12 divisors (see below), whose sum is σ = 4661076. Its totient is φ = 887808.

The previous prime is 2219527. The next prime is 2219543. The reversal of 2219540 is 459122.

It can be written as a sum of positive squares in 2 ways, for example, as 1175056 + 1044484 = 1084^2 + 1022^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2219543) 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, 55469 + ... + 55508.

It is an arithmetic number, because the mean of its divisors is an integer number (388423).

2^2219540 is an apocalyptic number.

2219540 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2219540 is an abundant number, since it is smaller than the sum of its proper divisors (2441536).

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

2219540 is a wasteful number, since it uses less digits than its factorization.

2219540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 110986 (or 110984 counting only the distinct ones).

The product of its (nonzero) digits is 720, while the sum is 23.

The square root of 2219540 is about 1489.8120686852. The cubic root of 2219540 is about 130.4430641763.

The spelling of 2219540 in words is "two million, two hundred nineteen thousand, five hundred forty".