205307134 has 4 divisors (see below), whose sum is σ = 307960704. Its totient is φ = 102653566.

The previous prime is 205307129. The next prime is 205307143. The reversal of 205307134 is 431703502.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 431703502 = 2 ⋅215851751.

It is a junction number, because it is equal to n+sod(n) for n = 205307099 and 205307108.

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, 51326782 + ... + 51326785.

It is an arithmetic number, because the mean of its divisors is an integer number (76990176).

Almost surely, 2^205307134 is an apocalyptic number.

205307134 is a deficient number, since it is larger than the sum of its proper divisors (102653570).

205307134 is a wasteful number, since it uses less digits than its factorization.

205307134 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 102653569.

The product of its (nonzero) digits is 2520, while the sum is 25.

The square root of 205307134 is about 14328.5426334991. The cubic root of 205307134 is about 589.9311745820.

The spelling of 205307134 in words is "two hundred five million, three hundred seven thousand, one hundred thirty-four".