212440105 has 8 divisors (see below), whose sum is σ = 255068352. Its totient is φ = 169858608.

The previous prime is 212440099. The next prime is 212440157. The reversal of 212440105 is 501044212.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 212440105 - 2⁵ = 212440073 is a prime.

It is a super-2 number, since 2×212440105² = 90261596424822050, which contains 22 as substring.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 757 + ... + 20626.

It is an arithmetic number, because the mean of its divisors is an integer number (31883544).

Almost surely, 2^212440105 is an apocalyptic number.

It is an amenable number.

212440105 is a deficient number, since it is larger than the sum of its proper divisors (42628247).

212440105 is a wasteful number, since it uses less digits than its factorization.

212440105 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23375.

The product of its (nonzero) digits is 320, while the sum is 19.

The square root of 212440105 is about 14575.3252107800. The cubic root of 212440105 is about 596.6855250672.

Adding to 212440105 its reverse (501044212), we get a palindrome (713484317).

The spelling of 212440105 in words is "two hundred twelve million, four hundred forty thousand, one hundred five".