212873070 has 32 divisors (see below), whose sum is σ = 518525568. Its totient is φ = 55918368.

The previous prime is 212873053. The next prime is 212873071. The reversal of 212873070 is 70378212.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212873071) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 50944 + ... + 54963.

It is an arithmetic number, because the mean of its divisors is an integer number (16203924).

Almost surely, 2^212873070 is an apocalyptic number.

212873070 is an abundant number, since it is smaller than the sum of its proper divisors (305652498).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

212873070 is a wasteful number, since it uses less digits than its factorization.

212873070 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 105984.

The product of its (nonzero) digits is 4704, while the sum is 30.

The square root of 212873070 is about 14590.1703211443. The cubic root of 212873070 is about 597.0906096600.

The spelling of 212873070 in words is "two hundred twelve million, eight hundred seventy-three thousand, seventy".