211142438 has 16 divisors (see below), whose sum is σ = 355906656. Its totient is φ = 93213120.

The previous prime is 211142429. The next prime is 211142467. The reversal of 211142438 is 834241112.

211142438 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×211142438² = 89162258249167688, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (26).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 175943 + ... + 177138.

It is an arithmetic number, because the mean of its divisors is an integer number (22244166).

Almost surely, 2^211142438 is an apocalyptic number.

211142438 is a deficient number, since it is larger than the sum of its proper divisors (144764218).

211142438 is a wasteful number, since it uses less digits than its factorization.

211142438 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 353119.

The product of its digits is 1536, while the sum is 26.

The square root of 211142438 is about 14530.7411373268. The cubic root of 211142438 is about 595.4681135982.

The spelling of 211142438 in words is "two hundred eleven million, one hundred forty-two thousand, four hundred thirty-eight".