1023503531 has 2 divisors, whose sum is σ = 1023503532. Its totient is φ = 1023503530.

The previous prime is 1023503491. The next prime is 1023503543. The reversal of 1023503531 is 1353053201.

1023503531 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is an emirp because it is prime and its reverse (1353053201) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1023503531 is a prime.

It is a super-2 number, since 2×1023503531² = 2095118955938935922, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1023503497 and 1023503506.

It is not a weakly prime, because it can be changed into another prime (1023503231) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 511751765 + 511751766.

It is an arithmetic number, because the mean of its divisors is an integer number (511751766).

Almost surely, 2^1023503531 is an apocalyptic number.

1023503531 is a deficient number, since it is larger than the sum of its proper divisors (1).

1023503531 is an equidigital number, since it uses as much as digits as its factorization.

1023503531 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1350, while the sum is 23.

The square root of 1023503531 is about 31992.2417313948. The cubic root of 1023503531 is about 1007.7739199001.

Adding to 1023503531 its reverse (1353053201), we get a palindrome (2376556732).

The spelling of 1023503531 in words is "one billion, twenty-three million, five hundred three thousand, five hundred thirty-one".