211420490 has 16 divisors (see below), whose sum is σ = 381250152. Its totient is φ = 84414144.

The previous prime is 211420487. The next prime is 211420493. The reversal of 211420490 is 94024112.

It is an interprime number because it is at equal distance from previous prime (211420487) and next prime (211420493).

It can be written as a sum of positive squares in 4 ways, for example, as 54745201 + 156675289 = 7399^2 + 12517^2 .

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (211420493) 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, 13409 + ... + 24548.

Almost surely, 2^211420490 is an apocalyptic number.

211420490 is a deficient number, since it is larger than the sum of its proper divisors (169829662).

211420490 is a wasteful number, since it uses less digits than its factorization.

211420490 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38521.

The product of its (nonzero) digits is 576, while the sum is 23.

The square root of 211420490 is about 14540.3057051769. The cubic root of 211420490 is about 595.7293882063.

The spelling of 211420490 in words is "two hundred eleven million, four hundred twenty thousand, four hundred ninety".