212641542 has 48 divisors (see below), whose sum is σ = 489080592. Its totient is φ = 66539520.

The previous prime is 212641529. The next prime is 212641567. The reversal of 212641542 is 245146212.

212641542 is a `hidden beast` number, since 2 + 12 + 641 + 5 + 4 + 2 = 666.

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 in 23 ways as a sum of consecutive naturals, for example, 174118 + ... + 175334.

It is an arithmetic number, because the mean of its divisors is an integer number (10189179).

Almost surely, 2^212641542 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 212641542, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (244540296).

212641542 is an abundant number, since it is smaller than the sum of its proper divisors (276439050).

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

212641542 is a wasteful number, since it uses less digits than its factorization.

212641542 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1813 (or 1810 counting only the distinct ones).

The product of its digits is 3840, while the sum is 27.

The square root of 212641542 is about 14582.2337795003. The cubic root of 212641542 is about 596.8740591051.

Adding to 212641542 its reverse (245146212), we get a palindrome (457787754).

The spelling of 212641542 in words is "two hundred twelve million, six hundred forty-one thousand, five hundred forty-two".