205136354 has 4 divisors (see below), whose sum is σ = 307704534. Its totient is φ = 102568176.

The previous prime is 205136249. The next prime is 205136381. The reversal of 205136354 is 453631502.

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

It can be written as a sum of positive squares in only one way, i.e., 129846025 + 75290329 = 11395^2 + 8677^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 51284087 + ... + 51284090.

Almost surely, 2^205136354 is an apocalyptic number.

205136354 is a deficient number, since it is larger than the sum of its proper divisors (102568180).

205136354 is a wasteful number, since it uses less digits than its factorization.

205136354 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 102568179.

The product of its (nonzero) digits is 10800, while the sum is 29.

The square root of 205136354 is about 14322.5819599680. The cubic root of 205136354 is about 589.7675556629.

Adding to 205136354 its reverse (453631502), we get a palindrome (658767856).

The spelling of 205136354 in words is "two hundred five million, one hundred thirty-six thousand, three hundred fifty-four".