213438742 has 16 divisors (see below), whose sum is σ = 367646400. Its totient is φ = 91911240.

The previous prime is 213438737. The next prime is 213438779. The reversal of 213438742 is 247834312.

It is a junction number, because it is equal to n+sod(n) for n = 213438698 and 213438707.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 254892 + ... + 255727.

It is an arithmetic number, because the mean of its divisors is an integer number (22977900).

Almost surely, 2^213438742 is an apocalyptic number.

213438742 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

213438742 is a deficient number, since it is larger than the sum of its proper divisors (154207658).

213438742 is a wasteful number, since it uses less digits than its factorization.

213438742 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 510651.

The product of its digits is 32256, while the sum is 34.

The square root of 213438742 is about 14609.5428402124. The cubic root of 213438742 is about 597.6190289408.

The spelling of 213438742 in words is "two hundred thirteen million, four hundred thirty-eight thousand, seven hundred forty-two".