212720542 has 32 divisors (see below), whose sum is σ = 344085120. Its totient is φ = 98327520.

The previous prime is 212720531. The next prime is 212720549. The reversal of 212720542 is 245027212.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212720549) 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, 377553 + ... + 378115.

It is an arithmetic number, because the mean of its divisors is an integer number (10752660).

Almost surely, 2^212720542 is an apocalyptic number.

212720542 is a deficient number, since it is larger than the sum of its proper divisors (131364578).

212720542 is a wasteful number, since it uses less digits than its factorization.

212720542 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 808.

The product of its (nonzero) digits is 2240, while the sum is 25.

The square root of 212720542 is about 14584.9423036226. The cubic root of 212720542 is about 596.9479662887.

Adding to 212720542 its reverse (245027212), we get a palindrome (457747754).

The spelling of 212720542 in words is "two hundred twelve million, seven hundred twenty thousand, five hundred forty-two".