205010154451 has 4 divisors (see below), whose sum is σ = 215800162600. Its totient is φ = 194220146304.

The previous prime is 205010154449. The next prime is 205010154457. The reversal of 205010154451 is 154451010502.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 154451010502 = 2 ⋅77225505251.

It is a cyclic number.

It is not a de Polignac number, because 205010154451 - 2¹ = 205010154449 is a prime.

It is a super-2 number, since 2×205010154451² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (205010154457) 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, 5395004046 + ... + 5395004083.

It is an arithmetic number, because the mean of its divisors is an integer number (53950040650).

Almost surely, 2^205010154451 is an apocalyptic number.

205010154451 is a deficient number, since it is larger than the sum of its proper divisors (10790008149).

205010154451 is a wasteful number, since it uses less digits than its factorization.

205010154451 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10790008148.

The product of its (nonzero) digits is 4000, while the sum is 28.

Adding to 205010154451 its reverse (154451010502), we get a palindrome (359461164953).

The spelling of 205010154451 in words is "two hundred five billion, ten million, one hundred fifty-four thousand, four hundred fifty-one".