211140030 has 16 divisors (see below), whose sum is σ = 506736144. Its totient is φ = 56304000.

The previous prime is 211140011. The next prime is 211140031. The reversal of 211140030 is 30041112.

It is a happy number.

It is a super-2 number, since 2×211140030² = 89160224536801800, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 211139988 and 211140015.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (211140031) 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, 3518971 + ... + 3519030.

It is an arithmetic number, because the mean of its divisors is an integer number (31671009).

Almost surely, 2^211140030 is an apocalyptic number.

211140030 is an abundant number, since it is smaller than the sum of its proper divisors (295596114).

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

211140030 is a wasteful number, since it uses less digits than its factorization.

211140030 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7038011.

The product of its (nonzero) digits is 24, while the sum is 12.

The square root of 211140030 is about 14530.6582782749. The cubic root of 211140030 is about 595.4658498930.

Adding to 211140030 its reverse (30041112), we get a palindrome (241181142).

The spelling of 211140030 in words is "two hundred eleven million, one hundred forty thousand, thirty".