212342945 has 16 divisors (see below), whose sum is σ = 260817408. Its totient is φ = 165887040.

The previous prime is 212342939. The next prime is 212342981. The reversal of 212342945 is 549243212.

It is not a de Polignac number, because 212342945 - 2⁴ = 212342929 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 154652 + ... + 156018.

It is an arithmetic number, because the mean of its divisors is an integer number (16301088).

Almost surely, 2^212342945 is an apocalyptic number.

It is an amenable number.

212342945 is a deficient number, since it is larger than the sum of its proper divisors (48474463).

212342945 is a wasteful number, since it uses less digits than its factorization.

212342945 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2080.

The product of its digits is 17280, while the sum is 32.

The square root of 212342945 is about 14571.9917993389. The cubic root of 212342945 is about 596.5945460028.

The spelling of 212342945 in words is "two hundred twelve million, three hundred forty-two thousand, nine hundred forty-five".