213031222 has 16 divisors (see below), whose sum is σ = 323244432. Its totient is φ = 105287680.

The previous prime is 213031219. The next prime is 213031223. The reversal of 213031222 is 222130312.

213031222 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a junction number, because it is equal to n+sod(n) for n = 213031196 and 213031205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (213031223) 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, 136398 + ... + 137950.

It is an arithmetic number, because the mean of its divisors is an integer number (20202777).

Almost surely, 2^213031222 is an apocalyptic number.

213031222 is a deficient number, since it is larger than the sum of its proper divisors (110213210).

213031222 is a wasteful number, since it uses less digits than its factorization.

213031222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2303.

The product of its (nonzero) digits is 144, while the sum is 16.

The square root of 213031222 is about 14595.5891282264. The cubic root of 213031222 is about 597.2384406315.

Adding to 213031222 its reverse (222130312), we get a palindrome (435161534).

It can be divided in two parts, 2130312 and 22, that multiplied together give a palindrome (46866864).

The spelling of 213031222 in words is "two hundred thirteen million, thirty-one thousand, two hundred twenty-two".