213220134 has 16 divisors (see below), whose sum is σ = 473822640. Its totient is φ = 71073360.

The previous prime is 213220127. The next prime is 213220177. The reversal of 213220134 is 431022312.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1974207 + ... + 1974314.

It is an arithmetic number, because the mean of its divisors is an integer number (29613915).

Almost surely, 2^213220134 is an apocalyptic number.

213220134 is an abundant number, since it is smaller than the sum of its proper divisors (260602506).

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

213220134 is a wasteful number, since it uses less digits than its factorization.

213220134 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3948532 (or 3948526 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 18.

The square root of 213220134 is about 14602.0592383403. The cubic root of 213220134 is about 597.4149283362.

Adding to 213220134 its reverse (431022312), we get a palindrome (644242446).

The spelling of 213220134 in words is "two hundred thirteen million, two hundred twenty thousand, one hundred thirty-four".