211342420 has 24 divisors (see below), whose sum is σ = 454142304. Its totient is φ = 82570656.

The previous prime is 211342403. The next prime is 211342447. The reversal of 211342420 is 24243112.

It is a congruent 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, 122014 + ... + 123733.

It is an arithmetic number, because the mean of its divisors is an integer number (18922596).

Almost surely, 2^211342420 is an apocalyptic number.

211342420 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

211342420 is an abundant number, since it is smaller than the sum of its proper divisors (242799884).

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

211342420 is a wasteful number, since it uses less digits than its factorization.

211342420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 245799 (or 245797 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 19.

The square root of 211342420 is about 14537.6208507445. The cubic root of 211342420 is about 595.6560520171.

Adding to 211342420 its reverse (24243112), we get a palindrome (235585532).

The spelling of 211342420 in words is "two hundred eleven million, three hundred forty-two thousand, four hundred twenty".