205415003431 has 4 divisors (see below), whose sum is σ = 224089094664. Its totient is φ = 186740912200.

The previous prime is 205415003383. The next prime is 205415003441. The reversal of 205415003431 is 134300514502.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-205415003431 is a prime.

It is a super-2 number, since 2×205415003431² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 205415003431.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (205415003441) 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, 9337045600 + ... + 9337045621.

It is an arithmetic number, because the mean of its divisors is an integer number (56022273666).

Almost surely, 2^205415003431 is an apocalyptic number.

205415003431 is a deficient number, since it is larger than the sum of its proper divisors (18674091233).

205415003431 is a wasteful number, since it uses less digits than its factorization.

205415003431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18674091232.

The product of its (nonzero) digits is 7200, while the sum is 28.

Adding to 205415003431 its reverse (134300514502), we get a palindrome (339715517933).

Subtracting from 205415003431 its reverse (134300514502), we obtain a square (71114488929 = 266673²).

The spelling of 205415003431 in words is "two hundred five billion, four hundred fifteen million, three thousand, four hundred thirty-one".