212055531 has 8 divisors (see below), whose sum is σ = 291861504. Its totient is φ = 136809960.

The previous prime is 212055521. The next prime is 212055533. The reversal of 212055531 is 135550212.

It is a happy number.

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

It is not a de Polignac number, because 212055531 - 2¹¹ = 212053483 is a prime.

It is a super-2 number, since 2×212055531² = 89935096455383922, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (212055533) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1139991 + ... + 1140176.

It is an arithmetic number, because the mean of its divisors is an integer number (36482688).

Almost surely, 2^212055531 is an apocalyptic number.

212055531 is a deficient number, since it is larger than the sum of its proper divisors (79805973).

212055531 is a wasteful number, since it uses less digits than its factorization.

212055531 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2280201.

The product of its (nonzero) digits is 1500, while the sum is 24.

The square root of 212055531 is about 14562.1265960711. The cubic root of 212055531 is about 596.3252535671.

The spelling of 212055531 in words is "two hundred twelve million, fifty-five thousand, five hundred thirty-one".