212555145 has 16 divisors (see below), whose sum is σ = 371005632. Its totient is φ = 103056960.

The previous prime is 212555129. The next prime is 212555153. The reversal of 212555145 is 541555212.

212555145 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 212555145 - 2⁴ = 212555129 is a prime.

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, 643942 + ... + 644271.

It is an arithmetic number, because the mean of its divisors is an integer number (23187852).

Almost surely, 2^212555145 is an apocalyptic number.

It is an amenable number.

212555145 is a deficient number, since it is larger than the sum of its proper divisors (158450487).

212555145 is a wasteful number, since it uses less digits than its factorization.

212555145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1288232.

The product of its digits is 10000, while the sum is 30.

The square root of 212555145 is about 14579.2710723136. The cubic root of 212555145 is about 596.7932108173.

The spelling of 212555145 in words is "two hundred twelve million, five hundred fifty-five thousand, one hundred forty-five".