205251134323 has 32 divisors (see below), whose sum is σ = 214878044160. Its totient is φ = 195841632000.

The previous prime is 205251134321. The next prime is 205251134419. The reversal of 205251134323 is 323431152502.

It is not a de Polignac number, because 205251134323 - 2¹ = 205251134321 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (31).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (205251134321) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 647479761 + ... + 647480077.

It is an arithmetic number, because the mean of its divisors is an integer number (6714938880).

Almost surely, 2^205251134323 is an apocalyptic number.

205251134323 is a deficient number, since it is larger than the sum of its proper divisors (9626909837).

205251134323 is a wasteful number, since it uses less digits than its factorization.

205251134323 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1179.

The product of its (nonzero) digits is 21600, while the sum is 31.

Adding to 205251134323 its reverse (323431152502), we get a palindrome (528682286825).

The spelling of 205251134323 in words is "two hundred five billion, two hundred fifty-one million, one hundred thirty-four thousand, three hundred twenty-three".