1020172031 has 2 divisors, whose sum is σ = 1020172032. Its totient is φ = 1020172030.

The previous prime is 1020172001. The next prime is 1020172051. The reversal of 1020172031 is 1302710201.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1020172031 - 2¹⁸ = 1019909887 is a prime.

It is a super-2 number, since 2×1020172031² = 2081501945669329922, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1020172001) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 510086015 + 510086016.

It is an arithmetic number, because the mean of its divisors is an integer number (510086016).

Almost surely, 2^1020172031 is an apocalyptic number.

1020172031 is a deficient number, since it is larger than the sum of its proper divisors (1).

1020172031 is an equidigital number, since it uses as much as digits as its factorization.

1020172031 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 84, while the sum is 17.

The square root of 1020172031 is about 31940.1319815683. The cubic root of 1020172031 is about 1006.6792979839.

Adding to 1020172031 its reverse (1302710201), we get a palindrome (2322882232).

The spelling of 1020172031 in words is "one billion, twenty million, one hundred seventy-two thousand, thirty-one".