30131031 has 12 divisors (see below), whose sum is σ = 46734072. Its totient is φ = 17217648.

The previous prime is 30130999. The next prime is 30131033. The reversal of 30131031 is 13013103.

It is not a de Polignac number, because 30131031 - 2⁵ = 30130999 is a prime.

It is a super-2 number, since 2×30131031² = 1815758058245922, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 30130998 and 30131016.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30131033) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 102340 + ... + 102633.

It is an arithmetic number, because the mean of its divisors is an integer number (3894506).

Almost surely, 2^30131031 is an apocalyptic number.

30131031 is a deficient number, since it is larger than the sum of its proper divisors (16603041).

30131031 is a wasteful number, since it uses less digits than its factorization.

30131031 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 204990 (or 204983 counting only the distinct ones).

The product of its (nonzero) digits is 27, while the sum is 12.

The square root of 30131031 is about 5489.1739815750. The cubic root of 30131031 is about 311.1749755465.

Adding to 30131031 its reverse (13013103), we get a palindrome (43144134).

The spelling of 30131031 in words is "thirty million, one hundred thirty-one thousand, thirty-one".