212542023 has 16 divisors (see below), whose sum is σ = 295402880. Its totient is φ = 135802656.

The previous prime is 212542021. The next prime is 212542061. The reversal of 212542023 is 320245212.

It is not a de Polignac number, because 212542023 - 2¹ = 212542021 is a prime.

It is a super-2 number, since 2×212542023² = 90348223081865058, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212542021) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 6853 + ... + 21726.

It is an arithmetic number, because the mean of its divisors is an integer number (18462680).

Almost surely, 2^212542023 is an apocalyptic number.

212542023 is a deficient number, since it is larger than the sum of its proper divisors (82860857).

212542023 is a wasteful number, since it uses less digits than its factorization.

212542023 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28686.

The product of its (nonzero) digits is 960, while the sum is 21.

The square root of 212542023 is about 14578.8210428690. The cubic root of 212542023 is about 596.7809296409.

Adding to 212542023 its reverse (320245212), we get a palindrome (532787235).

The spelling of 212542023 in words is "two hundred twelve million, five hundred forty-two thousand, twenty-three".