212311442 has 32 divisors (see below), whose sum is σ = 371589120. Its totient is φ = 89102160.

The previous prime is 212311417. The next prime is 212311447. The reversal of 212311442 is 244113212.

It is a super-2 number, since 2×212311442² = 90152296808238728, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (212311447) 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, 165359 + ... + 166637.

It is an arithmetic number, because the mean of its divisors is an integer number (11612160).

Almost surely, 2^212311442 is an apocalyptic number.

212311442 is a deficient number, since it is larger than the sum of its proper divisors (159277678).

212311442 is a wasteful number, since it uses less digits than its factorization.

212311442 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1526.

The product of its digits is 384, while the sum is 20.

The square root of 212311442 is about 14570.9108157315. The cubic root of 212311442 is about 596.5650411413.

Adding to 212311442 its reverse (244113212), we get a palindrome (456424654).

The spelling of 212311442 in words is "two hundred twelve million, three hundred eleven thousand, four hundred forty-two".