205414445051 has 4 divisors (see below), whose sum is σ = 212040717504. Its totient is φ = 198788172600.

The previous prime is 205414444981. The next prime is 205414445053. The reversal of 205414445051 is 150544414502.

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 205414445051 - 2¹⁸ = 205414182907 is a prime.

It is a super-2 number, since 2×205414445051² (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 (205414445053) 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, 3313136180 + ... + 3313136241.

It is an arithmetic number, because the mean of its divisors is an integer number (53010179376).

Almost surely, 2^205414445051 is an apocalyptic number.

205414445051 is a deficient number, since it is larger than the sum of its proper divisors (6626272453).

205414445051 is an equidigital number, since it uses as much as digits as its factorization.

205414445051 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6626272452.

The product of its (nonzero) digits is 64000, while the sum is 35.

Adding to 205414445051 its reverse (150544414502), we get a palindrome (355958859553).

The spelling of 205414445051 in words is "two hundred five billion, four hundred fourteen million, four hundred forty-five thousand, fifty-one".