211442405315 has 4 divisors (see below), whose sum is σ = 253730886384. Its totient is φ = 169153924248.

The previous prime is 211442405269. The next prime is 211442405323. The reversal of 211442405315 is 513504244112.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 211442405315 - 2¹⁰ = 211442404291 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 21144240527 + ... + 21144240536.

It is an arithmetic number, because the mean of its divisors is an integer number (63432721596).

Almost surely, 2^211442405315 is an apocalyptic number.

211442405315 is a deficient number, since it is larger than the sum of its proper divisors (42288481069).

211442405315 is an equidigital number, since it uses as much as digits as its factorization.

211442405315 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42288481068.

The product of its (nonzero) digits is 19200, while the sum is 32.

Adding to 211442405315 its reverse (513504244112), we get a palindrome (724946649427).

The spelling of 211442405315 in words is "two hundred eleven billion, four hundred forty-two million, four hundred five thousand, three hundred fifteen".