212440542 has 16 divisors (see below), whose sum is σ = 425900160. Its totient is φ = 70643672.

The previous prime is 212440537. The next prime is 212440549. The reversal of 212440542 is 245044212.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212440549) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 39738 + ... + 44765.

It is an arithmetic number, because the mean of its divisors is an integer number (26618760).

Almost surely, 2^212440542 is an apocalyptic number.

212440542 is an abundant number, since it is smaller than the sum of its proper divisors (213459618).

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

212440542 is a wasteful number, since it uses less digits than its factorization.

212440542 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 84927.

The product of its (nonzero) digits is 2560, while the sum is 24.

The square root of 212440542 is about 14575.3402018615. The cubic root of 212440542 is about 596.6859342044.

Adding to 212440542 its reverse (245044212), we get a palindrome (457484754).

The spelling of 212440542 in words is "two hundred twelve million, four hundred forty thousand, five hundred forty-two".