212581742 has 8 divisors (see below), whose sum is σ = 319188600. Its totient is φ = 106185544.

The previous prime is 212581717. The next prime is 212581769. The reversal of 212581742 is 247185212.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a junction number, because it is equal to n+sod(n) for n = 212581699 and 212581708.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 50117 + ... + 54192.

It is an arithmetic number, because the mean of its divisors is an integer number (39898575).

Almost surely, 2^212581742 is an apocalyptic number.

212581742 is a deficient number, since it is larger than the sum of its proper divisors (106606858).

212581742 is a wasteful number, since it uses less digits than its factorization.

212581742 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 105330.

The product of its digits is 8960, while the sum is 32.

The square root of 212581742 is about 14580.1831950082. The cubic root of 212581742 is about 596.8181020002.

The spelling of 212581742 in words is "two hundred twelve million, five hundred eighty-one thousand, seven hundred forty-two".