213471378 has 48 divisors (see below), whose sum is σ = 483327000. Its totient is φ = 68006400.

The previous prime is 213471373. The next prime is 213471413. The reversal of 213471378 is 873174312.

213471378 is a `hidden beast` number, since 213 + 4 + 71 + 378 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 203148009 + 10323369 = 14253^2 + 3213^2 .

It is not an unprimeable number, because it can be changed into a prime (213471373) 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, 50698 + ... + 54746.

Almost surely, 2^213471378 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 213471378, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (241663500).

213471378 is an abundant number, since it is smaller than the sum of its proper divisors (269855622).

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

213471378 is a wasteful number, since it uses less digits than its factorization.

213471378 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4187 (or 4184 counting only the distinct ones).

The product of its digits is 28224, while the sum is 36.

The square root of 213471378 is about 14610.6597386976. The cubic root of 213471378 is about 597.6494871735.

The spelling of 213471378 in words is "two hundred thirteen million, four hundred seventy-one thousand, three hundred seventy-eight".