1020320231 has 4 divisors (see below), whose sum is σ = 1166080272. Its totient is φ = 874560192.

The previous prime is 1020320209. The next prime is 1020320233. The reversal of 1020320231 is 1320230201.

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 1020320231 - 2⁶ = 1020320167 is a prime.

It is a super-2 number, since 2×1020320231² = 2082106747575786722, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1020320233) 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, 72880010 + ... + 72880023.

It is an arithmetic number, because the mean of its divisors is an integer number (291520068).

Almost surely, 2^1020320231 is an apocalyptic number.

1020320231 is a deficient number, since it is larger than the sum of its proper divisors (145760041).

1020320231 is an equidigital number, since it uses as much as digits as its factorization.

1020320231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 145760040.

The product of its (nonzero) digits is 72, while the sum is 14.

The square root of 1020320231 is about 31942.4518626858. The cubic root of 1020320231 is about 1006.7280422622.

Adding to 1020320231 its reverse (1320230201), we get a palindrome (2340550432).

The spelling of 1020320231 in words is "one billion, twenty million, three hundred twenty thousand, two hundred thirty-one".