211420454 has 16 divisors (see below), whose sum is σ = 364662528. Its totient is φ = 90051912.

The previous prime is 211420453. The next prime is 211420471. The reversal of 211420454 is 454024112.

It is a super-2 number, since 2×211420454² = 89397216739132232, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (211420453) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 44042 + ... + 48605.

It is an arithmetic number, because the mean of its divisors is an integer number (22791408).

Almost surely, 2^211420454 is an apocalyptic number.

211420454 is a deficient number, since it is larger than the sum of its proper divisors (153242074).

211420454 is a wasteful number, since it uses less digits than its factorization.

211420454 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 92819.

The product of its (nonzero) digits is 1280, while the sum is 23.

The square root of 211420454 is about 14540.3044672386. The cubic root of 211420454 is about 595.7293543933.

Adding to 211420454 its reverse (454024112), we get a palindrome (665444566).

The spelling of 211420454 in words is "two hundred eleven million, four hundred twenty thousand, four hundred fifty-four".