213520156 has 48 divisors (see below), whose sum is σ = 398240640. Its totient is φ = 100013760.

The previous prime is 213520121. The next prime is 213520159. The reversal of 213520156 is 651025312.

213520156 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a self number, because there is not a number n which added to its sum of digits gives 213520156.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (213520159) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 644911 + ... + 645241.

It is an arithmetic number, because the mean of its divisors is an integer number (8296680).

Almost surely, 2^213520156 is an apocalyptic number.

It is an amenable number.

213520156 is a deficient number, since it is larger than the sum of its proper divisors (184720484).

213520156 is a wasteful number, since it uses less digits than its factorization.

213520156 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 514 (or 512 counting only the distinct ones).

The product of its (nonzero) digits is 1800, while the sum is 25.

The square root of 213520156 is about 14612.3289040454. The cubic root of 213520156 is about 597.6950044802.

Adding to 213520156 its reverse (651025312), we get a palindrome (864545468).

The spelling of 213520156 in words is "two hundred thirteen million, five hundred twenty thousand, one hundred fifty-six".