211142430 has 32 divisors (see below), whose sum is σ = 563047200. Its totient is φ = 56304576.

The previous prime is 211142429. The next prime is 211142467. The reversal of 211142430 is 34241112.

211142430 is a `hidden beast` number, since 211 + 1 + 424 + 30 = 666.

It is a super-2 number, since 2×211142430² = 89162251492609800, which contains 22 as substring.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 390735 + ... + 391274.

It is an arithmetic number, because the mean of its divisors is an integer number (17595225).

Almost surely, 2^211142430 is an apocalyptic number.

211142430 is an abundant number, since it is smaller than the sum of its proper divisors (351904770).

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

211142430 is a wasteful number, since it uses less digits than its factorization.

211142430 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 782025 (or 782019 counting only the distinct ones).

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

The square root of 211142430 is about 14530.7408620483. The cubic root of 211142430 is about 595.4681060776.

Adding to 211142430 its reverse (34241112), we get a palindrome (245383542).

The spelling of 211142430 in words is "two hundred eleven million, one hundred forty-two thousand, four hundred thirty".