205240534 has 4 divisors (see below), whose sum is σ = 307860804. Its totient is φ = 102620266.

The previous prime is 205240513. The next prime is 205240537. The reversal of 205240534 is 435042502.

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

It is a junction number, because it is equal to n+sod(n) for n = 205240499 and 205240508.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (205240537) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 51310132 + ... + 51310135.

It is an arithmetic number, because the mean of its divisors is an integer number (76965201).

Almost surely, 2^205240534 is an apocalyptic number.

205240534 is a deficient number, since it is larger than the sum of its proper divisors (102620270).

205240534 is a wasteful number, since it uses less digits than its factorization.

205240534 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 102620269.

The product of its (nonzero) digits is 4800, while the sum is 25.

The square root of 205240534 is about 14326.2184124074. The cubic root of 205240534 is about 589.8673780241.

The spelling of 205240534 in words is "two hundred five million, two hundred forty thousand, five hundred thirty-four".