213012522 has 24 divisors (see below), whose sum is σ = 481594464. Its totient is φ = 67916904.

The previous prime is 213012521. The next prime is 213012523. The reversal of 213012522 is 225210312.

213012522 is a `hidden beast` number, since 2 + 130 + 12 + 522 = 666.

It is an interprime number because it is at equal distance from previous prime (213012521) and next prime (213012523).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 213012495 and 213012504.

It is not an unprimeable number, because it can be changed into a prime (213012521) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 256848 + ... + 257675.

It is an arithmetic number, because the mean of its divisors is an integer number (20066436).

Almost surely, 2^213012522 is an apocalyptic number.

213012522 is an abundant number, since it is smaller than the sum of its proper divisors (268581942).

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

213012522 is a wasteful number, since it uses less digits than its factorization.

213012522 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 514554 (or 514551 counting only the distinct ones).

The product of its (nonzero) digits is 240, while the sum is 18.

The square root of 213012522 is about 14594.9485096728. The cubic root of 213012522 is about 597.2209648118.

Adding to 213012522 its reverse (225210312), we get a palindrome (438222834).

The spelling of 213012522 in words is "two hundred thirteen million, twelve thousand, five hundred twenty-two".