212575830 has 64 divisors (see below), whose sum is σ = 526279680. Its totient is φ = 54923264.

The previous prime is 212575793. The next prime is 212575843. The reversal of 212575830 is 38575212.

It is a junction number, because it is equal to n+sod(n) for n = 212575791 and 212575800.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 150166 + ... + 151574.

It is an arithmetic number, because the mean of its divisors is an integer number (8223120).

Almost surely, 2^212575830 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 212575830, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (263139840).

212575830 is an abundant number, since it is smaller than the sum of its proper divisors (313703850).

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

212575830 is a wasteful number, since it uses less digits than its factorization.

212575830 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1573.

The product of its (nonzero) digits is 16800, while the sum is 33.

The square root of 212575830 is about 14579.9804526618. The cubic root of 212575830 is about 596.8125693499.

The spelling of 212575830 in words is "two hundred twelve million, five hundred seventy-five thousand, eight hundred thirty".