212123542 has 8 divisors (see below), whose sum is σ = 318868056. Its totient is φ = 105834192.

The previous prime is 212123521. The next prime is 212123557. The reversal of 212123542 is 245321212.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 112623 + ... + 114490.

It is an arithmetic number, because the mean of its divisors is an integer number (39858507).

Almost surely, 2^212123542 is an apocalyptic number.

212123542 is a deficient number, since it is larger than the sum of its proper divisors (106744514).

212123542 is a wasteful number, since it uses less digits than its factorization.

212123542 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 227582.

The product of its digits is 960, while the sum is 22.

The square root of 212123542 is about 14564.4616103720. The cubic root of 212123542 is about 596.3889984135.

Adding to 212123542 its reverse (245321212), we get a palindrome (457444754).

The spelling of 212123542 in words is "two hundred twelve million, one hundred twenty-three thousand, five hundred forty-two".