212439745 has 48 divisors (see below), whose sum is σ = 310722048. Its totient is φ = 138862080.

The previous prime is 212439743. The next prime is 212439749. The reversal of 212439745 is 547934212.

It is not a de Polignac number, because 212439745 - 2¹ = 212439743 is a prime.

It is not an unprimeable number, because it can be changed into a prime (212439743) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 630217 + ... + 630553.

It is an arithmetic number, because the mean of its divisors is an integer number (6473376).

Almost surely, 2^212439745 is an apocalyptic number.

It is an amenable number.

212439745 is a deficient number, since it is larger than the sum of its proper divisors (98282303).

212439745 is a wasteful number, since it uses less digits than its factorization.

212439745 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 470 (or 463 counting only the distinct ones).

The product of its digits is 60480, while the sum is 37.

The square root of 212439745 is about 14575.3128611361. The cubic root of 212439745 is about 596.6851880202.

The spelling of 212439745 in words is "two hundred twelve million, four hundred thirty-nine thousand, seven hundred forty-five".