612105211 has 4 divisors (see below), whose sum is σ = 618415672. Its totient is φ = 605794752.

The previous prime is 612105209. The next prime is 612105217. The reversal of 612105211 is 112501216.

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 612105211 - 2¹ = 612105209 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (612105217) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3155085 + ... + 3155278.

It is an arithmetic number, because the mean of its divisors is an integer number (154603918).

Almost surely, 2^612105211 is an apocalyptic number.

612105211 is a deficient number, since it is larger than the sum of its proper divisors (6310461).

612105211 is an equidigital number, since it uses as much as digits as its factorization.

612105211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6310460.

The product of its (nonzero) digits is 120, while the sum is 19.

The square root of 612105211 is about 24740.7601136263. The cubic root of 612105211 is about 849.0671246403.

Adding to 612105211 its reverse (112501216), we get a palindrome (724606427).

The spelling of 612105211 in words is "six hundred twelve million, one hundred five thousand, two hundred eleven".