212771490 has 64 divisors (see below), whose sum is σ = 547637760. Its totient is φ = 52715520.

The previous prime is 212771407. The next prime is 212771539. The reversal of 212771490 is 94177212.

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 31 ways as a sum of consecutive naturals, for example, 37650 + ... + 42930.

It is an arithmetic number, because the mean of its divisors is an integer number (8556840).

Almost surely, 2^212771490 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 212771490, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (273818880).

212771490 is an abundant number, since it is smaller than the sum of its proper divisors (334866270).

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

212771490 is a wasteful number, since it uses less digits than its factorization.

212771490 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5387.

The product of its (nonzero) digits is 7056, while the sum is 33.

The square root of 212771490 is about 14586.6887949253. The cubic root of 212771490 is about 596.9956201683.

The spelling of 212771490 in words is "two hundred twelve million, seven hundred seventy-one thousand, four hundred ninety".