511205226263101 has 4 divisors (see below), whose sum is σ = 511717969720732. Its totient is φ = 510692482805472.

The previous prime is 511205226263099. The next prime is 511205226263111. The reversal of 511205226263101 is 101362622502115.

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

It can be written as a sum of positive squares in 2 ways, for example, as 329271690764025 + 181933535499076 = 18145845^2 + 13488274^2 .

It is a cyclic number.

It is not a de Polignac number, because 511205226263101 - 2¹ = 511205226263099 is a prime.

It is a super-2 number, since 2×511205226263101² (a number of 30 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 (511205226263111) 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, 256371727320 + ... + 256371729313.

It is an arithmetic number, because the mean of its divisors is an integer number (127929492430183).

Almost surely, 2^{511205226263101} is an apocalyptic number.

It is an amenable number.

511205226263101 is a deficient number, since it is larger than the sum of its proper divisors (512743457631).

511205226263101 is an equidigital number, since it uses as much as digits as its factorization.

511205226263101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 512743457630.

The product of its (nonzero) digits is 43200, while the sum is 37.

Adding to 511205226263101 its reverse (101362622502115), we get a palindrome (612567848765216).

The spelling of 511205226263101 in words is "five hundred eleven trillion, two hundred five billion, two hundred twenty-six million, two hundred sixty-three thousand, one hundred one".