212123975 has 24 divisors (see below), whose sum is σ = 301156320. Its totient is φ = 145192320.

The previous prime is 212123959. The next prime is 212123987. The reversal of 212123975 is 579321212.

It is not a de Polignac number, because 212123975 - 2⁴ = 212123959 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 190721 + ... + 191829.

It is an arithmetic number, because the mean of its divisors is an integer number (12548180).

Almost surely, 2^212123975 is an apocalyptic number.

212123975 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

212123975 is a deficient number, since it is larger than the sum of its proper divisors (89032345).

212123975 is a wasteful number, since it uses less digits than its factorization.

212123975 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2219 (or 2214 counting only the distinct ones).

The product of its digits is 7560, while the sum is 32.

The square root of 212123975 is about 14564.4764753149. The cubic root of 212123975 is about 596.3894042089.

The spelling of 212123975 in words is "two hundred twelve million, one hundred twenty-three thousand, nine hundred seventy-five".