205432131 has 16 divisors (see below), whose sum is σ = 292118400. Its totient is φ = 127966848.

The previous prime is 205432127. The next prime is 205432141. The reversal of 205432131 is 131234502.

205432131 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 205432131 - 2² = 205432127 is a prime.

It is a super-2 number, since 2×205432131² = 84404720894402322, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 205432098 and 205432107.

It is not an unprimeable number, because it can be changed into a prime (205432141) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7401 + ... + 21578.

It is an arithmetic number, because the mean of its divisors is an integer number (18257400).

Almost surely, 2^205432131 is an apocalyptic number.

205432131 is a deficient number, since it is larger than the sum of its proper divisors (86686269).

205432131 is a wasteful number, since it uses less digits than its factorization.

205432131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29138.

The product of its (nonzero) digits is 720, while the sum is 21.

The square root of 205432131 is about 14332.9037881373. The cubic root of 205432131 is about 590.0508727560.

Adding to 205432131 its reverse (131234502), we get a palindrome (336666633).

The spelling of 205432131 in words is "two hundred five million, four hundred thirty-two thousand, one hundred thirty-one".