205244431454 has 4 divisors (see below), whose sum is σ = 307866647184. Its totient is φ = 102622215726.

The previous prime is 205244431421. The next prime is 205244431543. The reversal of 205244431454 is 454134442502.

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

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, 51311107862 + ... + 51311107865.

It is an arithmetic number, because the mean of its divisors is an integer number (76966661796).

Almost surely, 2^205244431454 is an apocalyptic number.

205244431454 is a deficient number, since it is larger than the sum of its proper divisors (102622215730).

205244431454 is a wasteful number, since it uses less digits than its factorization.

205244431454 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 102622215729.

The product of its (nonzero) digits is 307200, while the sum is 38.

Adding to 205244431454 its reverse (454134442502), we get a palindrome (659378873956).

The spelling of 205244431454 in words is "two hundred five billion, two hundred forty-four million, four hundred thirty-one thousand, four hundred fifty-four".