211142254 has 16 divisors (see below), whose sum is σ = 331568640. Its totient is φ = 100649560.

The previous prime is 211142249. The next prime is 211142257. The reversal of 211142254 is 452241112.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (211142257) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6927 + ... + 21685.

It is an arithmetic number, because the mean of its divisors is an integer number (20723040).

Almost surely, 2^211142254 is an apocalyptic number.

211142254 is a deficient number, since it is larger than the sum of its proper divisors (120426386).

211142254 is a wasteful number, since it uses less digits than its factorization.

211142254 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15095.

The product of its digits is 640, while the sum is 22.

The square root of 211142254 is about 14530.7348059209. The cubic root of 211142254 is about 595.4679406246.

Adding to 211142254 its reverse (452241112), we get a palindrome (663383366).

The spelling of 211142254 in words is "two hundred eleven million, one hundred forty-two thousand, two hundred fifty-four".