211424631 has 24 divisors (see below), whose sum is σ = 328092912. Its totient is φ = 120595200.

The previous prime is 211424627. The next prime is 211424639. The reversal of 211424631 is 136424112.

It is not a de Polignac number, because 211424631 - 2² = 211424627 is a prime.

It is a super-2 number, since 2×211424631² = 89400749186972322, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (211424639) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 10960 + ... + 23301.

It is an arithmetic number, because the mean of its divisors is an integer number (13670538).

Almost surely, 2^211424631 is an apocalyptic number.

211424631 is a deficient number, since it is larger than the sum of its proper divisors (116668281).

211424631 is a wasteful number, since it uses less digits than its factorization.

211424631 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34303 (or 34292 counting only the distinct ones).

The product of its digits is 1152, while the sum is 24.

The square root of 211424631 is about 14540.4481017608. The cubic root of 211424631 is about 595.7332776106.

Adding to 211424631 its reverse (136424112), we get a palindrome (347848743).

The spelling of 211424631 in words is "two hundred eleven million, four hundred twenty-four thousand, six hundred thirty-one".