511533056231 has 4 divisors (see below), whose sum is σ = 514596128592. Its totient is φ = 508469983872.

The previous prime is 511533056213. The next prime is 511533056233. The reversal of 511533056231 is 132650335115.

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 511533056231 - 2²² = 511528861927 is a prime.

It is a super-2 number, since 2×511533056231² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 511533056191 and 511533056200.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (511533056233) 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, 1531535930 + ... + 1531536263.

It is an arithmetic number, because the mean of its divisors is an integer number (128649032148).

Almost surely, 2^511533056231 is an apocalyptic number.

511533056231 is a deficient number, since it is larger than the sum of its proper divisors (3063072361).

511533056231 is a wasteful number, since it uses less digits than its factorization.

511533056231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3063072360.

The product of its (nonzero) digits is 40500, while the sum is 35.

The spelling of 511533056231 in words is "five hundred eleven billion, five hundred thirty-three million, fifty-six thousand, two hundred thirty-one".