531245440135 has 4 divisors (see below), whose sum is σ = 637494528168. Its totient is φ = 424996352104.

The previous prime is 531245440123. The next prime is 531245440157. The reversal of 531245440135 is 531044542135.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 531044542135 = 5 ⋅106208908427.

It is a cyclic number.

It is not a de Polignac number, because 531245440135 - 2⁹ = 531245439623 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 531245440094 and 531245440103.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 53124544009 + ... + 53124544018.

It is an arithmetic number, because the mean of its divisors is an integer number (159373632042).

Almost surely, 2^531245440135 is an apocalyptic number.

531245440135 is a deficient number, since it is larger than the sum of its proper divisors (106249088033).

531245440135 is a wasteful number, since it uses less digits than its factorization.

531245440135 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 106249088032.

The product of its (nonzero) digits is 144000, while the sum is 37.

The spelling of 531245440135 in words is "five hundred thirty-one billion, two hundred forty-five million, four hundred forty thousand, one hundred thirty-five".