2540222 has 4 divisors (see below), whose sum is σ = 3810336. Its totient is φ = 1270110.

The previous prime is 2540203. The next prime is 2540231. The reversal of 2540222 is 2220452.

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

It is a self number, because there is not a number n which added to its sum of digits gives 2540222.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 635054 + ... + 635057.

It is an arithmetic number, because the mean of its divisors is an integer number (952584).

2^2540222 is an apocalyptic number.

2540222 is a deficient number, since it is larger than the sum of its proper divisors (1270114).

2540222 is a wasteful number, since it uses less digits than its factorization.

2540222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1270113.

The product of its (nonzero) digits is 320, while the sum is 17.

The square root of 2540222 is about 1593.8073911235. The cubic root of 2540222 is about 136.4448739103. Note that the first 3 decimals are identical.

Adding to 2540222 its reverse (2220452), we get a palindrome (4760674).

The spelling of 2540222 in words is "two million, five hundred forty thousand, two hundred twenty-two".