1023431505 has 16 divisors (see below), whose sum is σ = 1643324544. Its totient is φ = 543885440.

The previous prime is 1023431503. The next prime is 1023431527. The reversal of 1023431505 is 5051343201.

It is not a de Polignac number, because 1023431505 - 2¹ = 1023431503 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1023431503) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 117189 + ... + 125618.

It is an arithmetic number, because the mean of its divisors is an integer number (102707784).

Almost surely, 2^1023431505 is an apocalyptic number.

1023431505 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1023431505 is a deficient number, since it is larger than the sum of its proper divisors (619893039).

1023431505 is a wasteful number, since it uses less digits than its factorization.

1023431505 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 243096.

The product of its (nonzero) digits is 1800, while the sum is 24.

The square root of 1023431505 is about 31991.1160324238. The cubic root of 1023431505 is about 1007.7502796537.

Adding to 1023431505 its reverse (5051343201), we get a palindrome (6074774706).

The spelling of 1023431505 in words is "one billion, twenty-three million, four hundred thirty-one thousand, five hundred five".