531400523111 has 2 divisors, whose sum is σ = 531400523112. Its totient is φ = 531400523110.

The previous prime is 531400523099. The next prime is 531400523141. The reversal of 531400523111 is 111325004135.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-531400523111 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (531400523141) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 265700261555 + 265700261556.

It is an arithmetic number, because the mean of its divisors is an integer number (265700261556).

Almost surely, 2^531400523111 is an apocalyptic number.

531400523111 is a deficient number, since it is larger than the sum of its proper divisors (1).

531400523111 is an equidigital number, since it uses as much as digits as its factorization.

531400523111 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1800, while the sum is 26.

Adding to 531400523111 its reverse (111325004135), we get a palindrome (642725527246).

The spelling of 531400523111 in words is "five hundred thirty-one billion, four hundred million, five hundred twenty-three thousand, one hundred eleven".