2217542 has 4 divisors (see below), whose sum is σ = 3326316. Its totient is φ = 1108770.

The previous prime is 2217541. The next prime is 2217557. The reversal of 2217542 is 2457122.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2217541) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 554384 + ... + 554387.

It is an arithmetic number, because the mean of its divisors is an integer number (831579).

2^2217542 is an apocalyptic number.

2217542 is a deficient number, since it is larger than the sum of its proper divisors (1108774).

2217542 is a wasteful number, since it uses less digits than its factorization.

2217542 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1108773.

The product of its digits is 1120, while the sum is 23.

The square root of 2217542 is about 1489.1413633366. The cubic root of 2217542 is about 130.4039113961.

The spelling of 2217542 in words is "two million, two hundred seventeen thousand, five hundred forty-two".