205822742 has 4 divisors (see below), whose sum is σ = 308734116. Its totient is φ = 102911370.

The previous prime is 205822741. The next prime is 205822759. The reversal of 205822742 is 247228502.

It is a semiprime because it is the product of two primes.

It is a super-2 number, since 2×205822742² = 84726002248797128, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 205822699 and 205822708.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (205822741) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 51455684 + ... + 51455687.

It is an arithmetic number, because the mean of its divisors is an integer number (77183529).

Almost surely, 2^205822742 is an apocalyptic number.

205822742 is a deficient number, since it is larger than the sum of its proper divisors (102911374).

205822742 is a wasteful number, since it uses less digits than its factorization.

205822742 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 102911373.

The product of its (nonzero) digits is 17920, while the sum is 32.

The square root of 205822742 is about 14346.5236904276. The cubic root of 205822742 is about 590.4246124677.

The spelling of 205822742 in words is "two hundred five million, eight hundred twenty-two thousand, seven hundred forty-two".