30211143 has 16 divisors (see below), whose sum is σ = 41726976. Its totient is φ = 19422720.

The previous prime is 30211117. The next prime is 30211147. The reversal of 30211143 is 34111203.

It is not a de Polignac number, because 30211143 - 2⁶ = 30211079 is a prime.

It is a super-2 number, since 2×30211143² = 1825426322732898, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30211147) 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, 52071 + ... + 52647.

It is an arithmetic number, because the mean of its divisors is an integer number (2607936).

Almost surely, 2^30211143 is an apocalyptic number.

30211143 is a deficient number, since it is larger than the sum of its proper divisors (11515833).

30211143 is a wasteful number, since it uses less digits than its factorization.

30211143 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1174.

The product of its (nonzero) digits is 72, while the sum is 15.

The square root of 30211143 is about 5496.4664103404. The cubic root of 30211143 is about 311.4505141733.

Adding to 30211143 its reverse (34111203), we get a palindrome (64322346).

The spelling of 30211143 in words is "thirty million, two hundred eleven thousand, one hundred forty-three".