211042254 has 16 divisors (see below), whose sum is σ = 423838800. Its totient is φ = 70055040.

The previous prime is 211042243. The next prime is 211042261. The reversal of 211042254 is 452240112.

It is a self number, because there is not a number n which added to its sum of digits gives 211042254.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 71529 + ... + 74420.

It is an arithmetic number, because the mean of its divisors is an integer number (26489925).

Almost surely, 2^211042254 is an apocalyptic number.

211042254 is an abundant number, since it is smaller than the sum of its proper divisors (212796546).

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

211042254 is a wasteful number, since it uses less digits than its factorization.

211042254 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 146195.

The product of its (nonzero) digits is 640, while the sum is 21.

The square root of 211042254 is about 14527.2934161873. The cubic root of 211042254 is about 595.3739183937.

Adding to 211042254 its reverse (452240112), we get a palindrome (663282366).

The spelling of 211042254 in words is "two hundred eleven million, forty-two thousand, two hundred fifty-four".