2215539 has 16 divisors (see below), whose sum is σ = 3389440. Its totient is φ = 1428840.

The previous prime is 2215537. The next prime is 2215541. The reversal of 2215539 is 9355122.

It is an interprime number because it is at equal distance from previous prime (2215537) and next prime (2215541).

It is not a de Polignac number, because 2215539 - 2¹ = 2215537 is a prime.

It is a super-2 number, since 2×2215539² = 9817226121042, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a d-powerful number, because it can be written as 2¹² + 2¹⁶ + 1 + 5⁶ + 5⁹ + 3¹¹ + 9 .

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2215531) 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, 487 + ... + 2160.

It is an arithmetic number, because the mean of its divisors is an integer number (211840).

2^2215539 is an apocalyptic number.

2215539 is a deficient number, since it is larger than the sum of its proper divisors (1173901).

2215539 is a wasteful number, since it uses less digits than its factorization.

2215539 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2687 (or 2681 counting only the distinct ones).

The product of its digits is 2700, while the sum is 27.

The square root of 2215539 is about 1488.4686761904. The cubic root of 2215539 is about 130.3646370228.

The spelling of 2215539 in words is "two million, two hundred fifteen thousand, five hundred thirty-nine".