212031542 has 4 divisors (see below), whose sum is σ = 318047316. Its totient is φ = 106015770.

The previous prime is 212031529. The next prime is 212031563. The reversal of 212031542 is 245130212.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 53007884 + ... + 53007887.

It is an arithmetic number, because the mean of its divisors is an integer number (79511829).

Almost surely, 2^212031542 is an apocalyptic number.

212031542 is a deficient number, since it is larger than the sum of its proper divisors (106015774).

212031542 is a wasteful number, since it uses less digits than its factorization.

212031542 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 106015773.

The product of its (nonzero) digits is 480, while the sum is 20.

The square root of 212031542 is about 14561.3028950022. The cubic root of 212031542 is about 596.3027660833.

Adding to 212031542 its reverse (245130212), we get a palindrome (457161754).

The spelling of 212031542 in words is "two hundred twelve million, thirty-one thousand, five hundred forty-two".