211340742 has 24 divisors (see below), whose sum is σ = 427919064. Its totient is φ = 69584544.

The previous prime is 211340741. The next prime is 211340761. The reversal of 211340742 is 247043112.

It is a happy number.

211340742 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×211340742² = 89329818458221128, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (211340741) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 38778 + ... + 43890.

It is an arithmetic number, because the mean of its divisors is an integer number (17829961).

Almost surely, 2^211340742 is an apocalyptic number.

211340742 is an abundant number, since it is smaller than the sum of its proper divisors (216578322).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

211340742 is an equidigital number, since it uses as much as digits as its factorization.

211340742 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5284 (or 5201 counting only the distinct ones).

The product of its (nonzero) digits is 1344, while the sum is 24.

The square root of 211340742 is about 14537.5631382980. The cubic root of 211340742 is about 595.6544755652.

Adding to 211340742 its reverse (247043112), we get a palindrome (458383854).

The spelling of 211340742 in words is "two hundred eleven million, three hundred forty thousand, seven hundred forty-two".