205151434 has 8 divisors (see below), whose sum is σ = 307788228. Its totient is φ = 102555360.

The previous prime is 205151431. The next prime is 205151489. The reversal of 205151434 is 434151502.

It is a happy number.

205151434 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 194686209 + 10465225 = 13953^2 + 3235^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×205151434² = 84174221744512712, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 205151399 and 205151408.

It is not an unprimeable number, because it can be changed into a prime (205151431) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12724 + ... + 23920.

Almost surely, 2^205151434 is an apocalyptic number.

205151434 is a deficient number, since it is larger than the sum of its proper divisors (102636794).

205151434 is a wasteful number, since it uses less digits than its factorization.

205151434 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20360.

The product of its (nonzero) digits is 2400, while the sum is 25.

The square root of 205151434 is about 14323.1083916865. The cubic root of 205151434 is about 589.7820069887.

The spelling of 205151434 in words is "two hundred five million, one hundred fifty-one thousand, four hundred thirty-four".