212154545 has 8 divisors (see below), whose sum is σ = 262798080. Its totient is φ = 164248560.

The previous prime is 212154529. The next prime is 212154583. The reversal of 212154545 is 545451212.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 212154545 - 2⁴ = 212154529 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 684215 + ... + 684524.

It is an arithmetic number, because the mean of its divisors is an integer number (32849760).

Almost surely, 2^212154545 is an apocalyptic number.

It is an amenable number.

212154545 is a deficient number, since it is larger than the sum of its proper divisors (50643535).

212154545 is a wasteful number, since it uses less digits than its factorization.

212154545 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1368775.

The product of its digits is 8000, while the sum is 29.

The square root of 212154545 is about 14565.5259088026. The cubic root of 212154545 is about 596.4180521546.

The spelling of 212154545 in words is "two hundred twelve million, one hundred fifty-four thousand, five hundred forty-five".