531440142525 has 72 divisors (see below), whose sum is σ = 973569901824. Its totient is φ = 276990729600.

The previous prime is 531440142521. The next prime is 531440142559. The reversal of 531440142525 is 525241044135.

531440142525 is a `hidden beast` number, since 53 + 1 + 4 + 40 + 1 + 42 + 525 = 666.

It is not a de Polignac number, because 531440142525 - 2² = 531440142521 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 531440142525.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (531440142521) by changing a digit.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 7122160 + ... + 7196390.

It is an arithmetic number, because the mean of its divisors is an integer number (13521804192).

Almost surely, 2^531440142525 is an apocalyptic number.

It is an amenable number.

531440142525 is a deficient number, since it is larger than the sum of its proper divisors (442129759299).

531440142525 is a wasteful number, since it uses less digits than its factorization.

531440142525 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 74971 (or 74963 counting only the distinct ones).

The product of its (nonzero) digits is 96000, while the sum is 36.

The spelling of 531440142525 in words is "five hundred thirty-one billion, four hundred forty million, one hundred forty-two thousand, five hundred twenty-five".