205023542 has 4 divisors (see below), whose sum is σ = 307535316. Its totient is φ = 102511770.

The previous prime is 205023517. The next prime is 205023571. The reversal of 205023542 is 245320502.

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

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 as a sum of consecutive naturals, namely, 51255884 + ... + 51255887.

It is an arithmetic number, because the mean of its divisors is an integer number (76883829).

Almost surely, 2^205023542 is an apocalyptic number.

205023542 is a deficient number, since it is larger than the sum of its proper divisors (102511774).

205023542 is a wasteful number, since it uses less digits than its factorization.

205023542 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 102511773.

The product of its (nonzero) digits is 2400, while the sum is 23.

The square root of 205023542 is about 14318.6431619759. The cubic root of 205023542 is about 589.6594242401.

The spelling of 205023542 in words is "two hundred five million, twenty-three thousand, five hundred forty-two".