212422531 has 8 divisors (see below), whose sum is σ = 227238480. Its totient is φ = 197864448.

The previous prime is 212422523. The next prime is 212422543. The reversal of 212422531 is 135224212.

It is a happy number.

212422531 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a cyclic number.

It is not a de Polignac number, because 212422531 - 2³ = 212422523 is a prime.

It is a super-2 number, since 2×212422531² = 90246663352891922, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (212422501) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 62761 + ... + 66058.

It is an arithmetic number, because the mean of its divisors is an integer number (28404810).

Almost surely, 2^212422531 is an apocalyptic number.

212422531 is a deficient number, since it is larger than the sum of its proper divisors (14815949).

212422531 is a wasteful number, since it uses less digits than its factorization.

212422531 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 128933.

The product of its digits is 960, while the sum is 22.

The square root of 212422531 is about 14574.7223301166. The cubic root of 212422531 is about 596.6690711110.

Adding to 212422531 its reverse (135224212), we get a palindrome (347646743).

The spelling of 212422531 in words is "two hundred twelve million, four hundred twenty-two thousand, five hundred thirty-one".