1020223231 has 4 divisors (see below), whose sum is σ = 1036948264. Its totient is φ = 1003498200.

The previous prime is 1020223229. The next prime is 1020223247. The reversal of 1020223231 is 1323220201.

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 1020223231 - 2¹ = 1020223229 is a prime.

It is a super-2 number, since 2×1020223231² = 2081710882144158722, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1020223291) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8362425 + ... + 8362546.

It is an arithmetic number, because the mean of its divisors is an integer number (259237066).

Almost surely, 2^1020223231 is an apocalyptic number.

1020223231 is a deficient number, since it is larger than the sum of its proper divisors (16725033).

1020223231 is an equidigital number, since it uses as much as digits as its factorization.

1020223231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16725032.

The product of its (nonzero) digits is 144, while the sum is 16.

The square root of 1020223231 is about 31940.9334710180. The cubic root of 1020223231 is about 1006.6961386461.

Adding to 1020223231 its reverse (1323220201), we get a palindrome (2343443432).

It can be divided in two parts, 10202 and 23231, that added together give a palindrome (33433).

The spelling of 1020223231 in words is "one billion, twenty million, two hundred twenty-three thousand, two hundred thirty-one".