213579906 has 16 divisors (see below), whose sum is σ = 437578848. Its totient is φ = 69456800.

The previous prime is 213579901. The next prime is 213579913. The reversal of 213579906 is 609975312.

213579906 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-3 number, since 3×213579906³ (a number of 26 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (213579901) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 433860 + ... + 434351.

It is an arithmetic number, because the mean of its divisors is an integer number (27348678).

Almost surely, 2^213579906 is an apocalyptic number.

213579906 is an abundant number, since it is smaller than the sum of its proper divisors (223998942).

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

213579906 is a wasteful number, since it uses less digits than its factorization.

213579906 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 868257.

The product of its (nonzero) digits is 102060, while the sum is 42.

The square root of 213579906 is about 14614.3732674378. The cubic root of 213579906 is about 597.7507508893.

The spelling of 213579906 in words is "two hundred thirteen million, five hundred seventy-nine thousand, nine hundred six".