213223770 has 48 divisors (see below), whose sum is σ = 564854472. Its totient is φ = 55785600.

The previous prime is 213223753. The next prime is 213223771. The reversal of 213223770 is 77322312.

It is a happy number.

213223770 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 4 ways, for example, as 116575209 + 96648561 = 10797^2 + 9831^2 .

It is not an unprimeable number, because it can be changed into a prime (213223771) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 17581 + ... + 27120.

Almost surely, 2^213223770 is an apocalyptic number.

213223770 is an abundant number, since it is smaller than the sum of its proper divisors (351630702).

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

213223770 is a wasteful number, since it uses less digits than its factorization.

213223770 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44767 (or 44764 counting only the distinct ones).

The product of its (nonzero) digits is 3528, while the sum is 27.

The square root of 213223770 is about 14602.1837407971. The cubic root of 213223770 is about 597.4183241824.

The spelling of 213223770 in words is "two hundred thirteen million, two hundred twenty-three thousand, seven hundred seventy".