1020231331 has 8 divisors (see below), whose sum is σ = 1194417504. Its totient is φ = 853154880.

The previous prime is 1020231323. The next prime is 1020231347. The reversal of 1020231331 is 1331320201.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1020231331 - 2³ = 1020231323 is a prime.

It is a super-2 number, since 2×1020231331² = 2081743937508063122, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1020231301) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1777120 + ... + 1777693.

It is an arithmetic number, because the mean of its divisors is an integer number (149302188).

Almost surely, 2^1020231331 is an apocalyptic number.

1020231331 is a deficient number, since it is larger than the sum of its proper divisors (174186173).

1020231331 is an equidigital number, since it uses as much as digits as its factorization.

1020231331 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3554861.

The product of its (nonzero) digits is 108, while the sum is 16.

The square root of 1020231331 is about 31941.0602673111. The cubic root of 1020231331 is about 1006.6988028399.

Adding to 1020231331 its reverse (1331320201), we get a palindrome (2351551532).

The spelling of 1020231331 in words is "one billion, twenty million, two hundred thirty-one thousand, three hundred thirty-one".