213903942 has 64 divisors (see below), whose sum is σ = 514252800. Its totient is φ = 58020480.

The previous prime is 213903917. The next prime is 213903959. The reversal of 213903942 is 249309312.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 72859 + ... + 75737.

It is an arithmetic number, because the mean of its divisors is an integer number (8035200).

Almost surely, 2^213903942 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 213903942, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (257126400).

213903942 is an abundant number, since it is smaller than the sum of its proper divisors (300348858).

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

213903942 is a wasteful number, since it uses less digits than its factorization.

213903942 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2981.

The product of its (nonzero) digits is 11664, while the sum is 33.

The square root of 213903942 is about 14625.4552749649. The cubic root of 213903942 is about 598.0528936857.

The spelling of 213903942 in words is "two hundred thirteen million, nine hundred three thousand, nine hundred forty-two".