1003520531531 has 4 divisors (see below), whose sum is σ = 1146880607472. Its totient is φ = 860160455592.

The previous prime is 1003520531441. The next prime is 1003520531579. The reversal of 1003520531531 is 1351350253001.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1003520531531 - 2²² = 1003516337227 is a prime.

It is a super-2 number, since 2×1003520531531² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1003520531494 and 1003520531503.

It is not an unprimeable number, because it can be changed into a prime (1003520531131) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 71680037960 + ... + 71680037973.

It is an arithmetic number, because the mean of its divisors is an integer number (286720151868).

Almost surely, 2^{1003520531531} is an apocalyptic number.

1003520531531 is a deficient number, since it is larger than the sum of its proper divisors (143360075941).

1003520531531 is an equidigital number, since it uses as much as digits as its factorization.

1003520531531 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 143360075940.

The product of its (nonzero) digits is 6750, while the sum is 29.

Adding to 1003520531531 its reverse (1351350253001), we get a palindrome (2354870784532).

The spelling of 1003520531531 in words is "one trillion, three billion, five hundred twenty million, five hundred thirty-one thousand, five hundred thirty-one".