511006106243 has 4 divisors (see below), whose sum is σ = 511061497080. Its totient is φ = 510950715408.

The previous prime is 511006106213. The next prime is 511006106251. The reversal of 511006106243 is 342601600115.

It is a happy number.

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 511006106243 - 2⁶ = 511006106179 is a prime.

It is a super-2 number, since 2×511006106243² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (511006106213) 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, 27681578 + ... + 27700031.

It is an arithmetic number, because the mean of its divisors is an integer number (127765374270).

Almost surely, 2^511006106243 is an apocalyptic number.

511006106243 is a deficient number, since it is larger than the sum of its proper divisors (55390837).

511006106243 is an equidigital number, since it uses as much as digits as its factorization.

511006106243 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55390836.

The product of its (nonzero) digits is 4320, while the sum is 29.

Adding to 511006106243 its reverse (342601600115), we get a palindrome (853607706358).

The spelling of 511006106243 in words is "five hundred eleven billion, six million, one hundred six thousand, two hundred forty-three".