211215041 has 4 divisors (see below), whose sum is σ = 211434432. Its totient is φ = 210995652.

The previous prime is 211215031. The next prime is 211215047. The reversal of 211215041 is 140512112.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 211215041 - 2⁶ = 211214977 is a prime.

It is a super-2 number, since 2×211215041² = 89223587089263362, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (211215047) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 108245 + ... + 110178.

It is an arithmetic number, because the mean of its divisors is an integer number (52858608).

Almost surely, 2^211215041 is an apocalyptic number.

It is an amenable number.

211215041 is a deficient number, since it is larger than the sum of its proper divisors (219391).

211215041 is an equidigital number, since it uses as much as digits as its factorization.

211215041 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 219390.

The product of its (nonzero) digits is 80, while the sum is 17.

The square root of 211215041 is about 14533.2391778296. The cubic root of 211215041 is about 595.5363579194.

Adding to 211215041 its reverse (140512112), we get a palindrome (351727153).

It can be divided in two parts, 21121 and 5041, that added together give a palindrome (26162).

The spelling of 211215041 in words is "two hundred eleven million, two hundred fifteen thousand, forty-one".