1031231020 has 12 divisors (see below), whose sum is σ = 2165585184. Its totient is φ = 412492400.

The previous prime is 1031231009. The next prime is 1031231053. The reversal of 1031231020 is 201321301.

It is a super-2 number, since 2×1031231020² = 2126874833220480800, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 25780756 + ... + 25780795.

It is an arithmetic number, because the mean of its divisors is an integer number (180465432).

Almost surely, 2^1031231020 is an apocalyptic number.

1031231020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1031231020 is an abundant number, since it is smaller than the sum of its proper divisors (1134354164).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1031231020 is a wasteful number, since it uses less digits than its factorization.

1031231020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51561560 (or 51561558 counting only the distinct ones).

The product of its (nonzero) digits is 36, while the sum is 13.

The square root of 1031231020 is about 32112.7859271039. The cubic root of 1031231020 is about 1010.3038069167.

Adding to 1031231020 its reverse (201321301), we get a palindrome (1232552321).

The spelling of 1031231020 in words is "one billion, thirty-one million, two hundred thirty-one thousand, twenty".