212155545 has 24 divisors (see below), whose sum is σ = 394870464. Its totient is φ = 96985056.

The previous prime is 212155523. The next prime is 212155571. The reversal of 212155545 is 545551212.

212155545 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 212155545 - 2⁶ = 212155481 is a prime.

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, 143589 + ... + 145058.

It is an arithmetic number, because the mean of its divisors is an integer number (16452936).

Almost surely, 2^212155545 is an apocalyptic number.

It is an amenable number.

212155545 is a deficient number, since it is larger than the sum of its proper divisors (182714919).

212155545 is a wasteful number, since it uses less digits than its factorization.

212155545 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 288669 (or 288662 counting only the distinct ones).

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

The square root of 212155545 is about 14565.5602363932. The cubic root of 212155545 is about 596.4189892343.

The spelling of 212155545 in words is "two hundred twelve million, one hundred fifty-five thousand, five hundred forty-five".