511223221053 has 6 divisors (see below), whose sum is σ = 738433541534. Its totient is φ = 340815480696.

The previous prime is 511223221049. The next prime is 511223221153. The reversal of 511223221053 is 350122322115.

511223221053 is a `hidden beast` number, since 511 + 2 + 23 + 22 + 105 + 3 = 666.

It can be written as a sum of positive squares in only one way, i.e., 338256233604 + 172966987449 = 581598^2 + 415893^2 .

It is not a de Polignac number, because 511223221053 - 2² = 511223221049 is a prime.

It is a super-2 number, since 2×511223221053² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (511223221153) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 28401290050 + ... + 28401290067.

Almost surely, 2^511223221053 is an apocalyptic number.

It is an amenable number.

511223221053 is a deficient number, since it is larger than the sum of its proper divisors (227210320481).

511223221053 is a wasteful number, since it uses less digits than its factorization.

511223221053 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 56802580123 (or 56802580120 counting only the distinct ones).

The product of its (nonzero) digits is 3600, while the sum is 27.

Adding to 511223221053 its reverse (350122322115), we get a palindrome (861345543168).

The spelling of 511223221053 in words is "five hundred eleven billion, two hundred twenty-three million, two hundred twenty-one thousand, fifty-three".