642346211 has 4 divisors (see below), whose sum is σ = 691757472. Its totient is φ = 592934952.

The previous prime is 642346183. The next prime is 642346249. The reversal of 642346211 is 112643246.

642346211 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 112643246 = 2 ⋅56321623.

It is a cyclic number.

It is not a de Polignac number, because 642346211 - 2⁶ = 642346147 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (642343211) 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, 24705611 + ... + 24705636.

It is an arithmetic number, because the mean of its divisors is an integer number (172939368).

Almost surely, 2^642346211 is an apocalyptic number.

642346211 is a deficient number, since it is larger than the sum of its proper divisors (49411261).

642346211 is a wasteful number, since it uses less digits than its factorization.

642346211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49411260.

The product of its digits is 6912, while the sum is 29.

The square root of 642346211 is about 25344.5499269567. The cubic root of 642346211 is about 862.8256664460.

Adding to 642346211 its reverse (112643246), we get a palindrome (754989457).

The spelling of 642346211 in words is "six hundred forty-two million, three hundred forty-six thousand, two hundred eleven".