211322142 has 32 divisors (see below), whose sum is σ = 494323200. Its totient is φ = 66732984.

The previous prime is 211322141. The next prime is 211322143. The reversal of 211322142 is 241223112.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (211322141) and next prime (211322143).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (211322141) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 101958 + ... + 104009.

It is an arithmetic number, because the mean of its divisors is an integer number (15447600).

Almost surely, 2^211322142 is an apocalyptic number.

211322142 is an abundant number, since it is smaller than the sum of its proper divisors (283001058).

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

211322142 is a wasteful number, since it uses less digits than its factorization.

211322142 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 205997 (or 205991 counting only the distinct ones).

The product of its digits is 192, while the sum is 18.

The square root of 211322142 is about 14536.9234021508. The cubic root of 211322142 is about 595.6370006284.

Adding to 211322142 its reverse (241223112), we get a palindrome (452545254).

The spelling of 211322142 in words is "two hundred eleven million, three hundred twenty-two thousand, one hundred forty-two".