212455545 has 32 divisors (see below), whose sum is σ = 360961920. Its totient is φ = 106337280.

The previous prime is 212455543. The next prime is 212455553. The reversal of 212455545 is 545554212.

212455545 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 212455545 - 2¹ = 212455543 is a prime.

It is not an unprimeable number, because it can be changed into a prime (212455541) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 106366 + ... + 108344.

It is an arithmetic number, because the mean of its divisors is an integer number (11280060).

Almost surely, 2^212455545 is an apocalyptic number.

It is an amenable number.

212455545 is a deficient number, since it is larger than the sum of its proper divisors (148506375).

212455545 is a wasteful number, since it uses less digits than its factorization.

212455545 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2425.

The product of its digits is 40000, while the sum is 33.

The square root of 212455545 is about 14575.8548634377. The cubic root of 212455545 is about 596.6999802809.

The spelling of 212455545 in words is "two hundred twelve million, four hundred fifty-five thousand, five hundred forty-five".