531021113507 has 2 divisors, whose sum is σ = 531021113508. Its totient is φ = 531021113506.

The previous prime is 531021113471. The next prime is 531021113531. The reversal of 531021113507 is 705311120135.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 531021113507 - 2²⁸ = 530752678051 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 531021113507.

It is not a weakly prime, because it can be changed into another prime (531021133507) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 265510556753 + 265510556754.

It is an arithmetic number, because the mean of its divisors is an integer number (265510556754).

Almost surely, 2^531021113507 is an apocalyptic number.

531021113507 is a deficient number, since it is larger than the sum of its proper divisors (1).

531021113507 is an equidigital number, since it uses as much as digits as its factorization.

531021113507 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3150, while the sum is 29.

The spelling of 531021113507 in words is "five hundred thirty-one billion, twenty-one million, one hundred thirteen thousand, five hundred seven".