213173370 has 160 divisors (see below), whose sum is σ = 616757328. Its totient is φ = 52641792.

The previous prime is 213173357. The next prime is 213173459. The reversal of 213173370 is 73371312.

213173370 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 8 ways, for example, as 64016001 + 149157369 = 8001^2 + 12213^2 .

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 1555942 + ... + 1556078.

Almost surely, 2^213173370 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 213173370, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (308378664).

213173370 is an abundant number, since it is smaller than the sum of its proper divisors (403583958).

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

213173370 is a wasteful number, since it uses less digits than its factorization.

213173370 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 286 (or 277 counting only the distinct ones).

The product of its (nonzero) digits is 2646, while the sum is 27.

The square root of 213173370 is about 14600.4578695327. The cubic root of 213173370 is about 597.3712496055.

The spelling of 213173370 in words is "two hundred thirteen million, one hundred seventy-three thousand, three hundred seventy".