205453126631231 has 4 divisors (see below), whose sum is σ = 207021471109464. Its totient is φ = 203884782153000.

The previous prime is 205453126631167. The next prime is 205453126631293. The reversal of 205453126631231 is 132136621354502.

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

It is a cyclic number.

It is not a de Polignac number, because 205453126631231 - 2⁶ = 205453126631167 is a prime.

It is a super-2 number, since 2×205453126631231² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (205453126633231) 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, 784172238920 + ... + 784172239181.

It is an arithmetic number, because the mean of its divisors is an integer number (51755367777366).

Almost surely, 2^{205453126631231} is an apocalyptic number.

205453126631231 is a deficient number, since it is larger than the sum of its proper divisors (1568344478233).

205453126631231 is a wasteful number, since it uses less digits than its factorization.

205453126631231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1568344478232.

The product of its (nonzero) digits is 777600, while the sum is 44.

Adding to 205453126631231 its reverse (132136621354502), we get a palindrome (337589747985733).

The spelling of 205453126631231 in words is "two hundred five trillion, four hundred fifty-three billion, one hundred twenty-six million, six hundred thirty-one thousand, two hundred thirty-one".