642213311 has 8 divisors (see below), whose sum is σ = 656682240. Its totient is φ = 627778008.

The previous prime is 642213283. The next prime is 642213347. The reversal of 642213311 is 113312246.

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 642213311 - 2¹⁰ = 642212287 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (642213371) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 32420 + ... + 48326.

It is an arithmetic number, because the mean of its divisors is an integer number (82085280).

Almost surely, 2^642213311 is an apocalyptic number.

642213311 is a deficient number, since it is larger than the sum of its proper divisors (14468929).

642213311 is a wasteful number, since it uses less digits than its factorization.

642213311 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16813.

The product of its digits is 864, while the sum is 23.

The square root of 642213311 is about 25341.9279258702. The cubic root of 642213311 is about 862.7661567723.

Adding to 642213311 its reverse (113312246), we get a palindrome (755525557).

The spelling of 642213311 in words is "six hundred forty-two million, two hundred thirteen thousand, three hundred eleven".