205891022 has 4 divisors (see below), whose sum is σ = 308836536. Its totient is φ = 102945510.

The previous prime is 205891001. The next prime is 205891073. The reversal of 205891022 is 220198502.

205891022 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a super-2 number, since 2×205891022² = 84782225880408968, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 51472754 + ... + 51472757.

It is an arithmetic number, because the mean of its divisors is an integer number (77209134).

Almost surely, 2^205891022 is an apocalyptic number.

205891022 is a deficient number, since it is larger than the sum of its proper divisors (102945514).

205891022 is a wasteful number, since it uses less digits than its factorization.

205891022 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 102945513.

The product of its (nonzero) digits is 2880, while the sum is 29.

The square root of 205891022 is about 14348.9031636568. The cubic root of 205891022 is about 590.4898947505.

The spelling of 205891022 in words is "two hundred five million, eight hundred ninety-one thousand, twenty-two".