531534542120340 has 288 divisors, whose sum is σ = 1726930445520000. Its totient is φ = 121725122872320.

The previous prime is 531534542120299. The next prime is 531534542120381. The reversal of 531534542120340 is 43021245435135.

It is an interprime number because it is at equal distance from previous prime (531534542120299) and next prime (531534542120381).

It is a junction number, because it is equal to n+sod(n) for n = 531534542120292 and 531534542120301.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 42620466 + ... + 53661654.

Almost surely, 2^{531534542120340} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 531534542120340, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (863465222760000).

531534542120340 is an abundant number, since it is smaller than the sum of its proper divisors (1195395903399660).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

531534542120340 is a wasteful number, since it uses less digits than its factorization.

531534542120340 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11041591 (or 11041578 counting only the distinct ones).

The product of its (nonzero) digits is 864000, while the sum is 42.

Adding to 531534542120340 its reverse (43021245435135), we get a palindrome (574555787555475).

The spelling of 531534542120340 in words is "five hundred thirty-one trillion, five hundred thirty-four billion, five hundred forty-two million, one hundred twenty thousand, three hundred forty".