30020031 has 8 divisors (see below), whose sum is σ = 44474160. Its totient is φ = 20013336.

The previous prime is 30019963. The next prime is 30020041. The reversal of 30020031 is 13002003.

It is a happy number.

It is not a de Polignac number, because 30020031 - 2⁷ = 30019903 is a prime.

It is a super-2 number, since 2×30020031² = 1802404522481922, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is a junction number, because it is equal to n+sod(n) for n = 30019995 and 30020022.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30020041) 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, 555900 + ... + 555953.

It is an arithmetic number, because the mean of its divisors is an integer number (5559270).

Almost surely, 2^30020031 is an apocalyptic number.

30020031 is a deficient number, since it is larger than the sum of its proper divisors (14454129).

30020031 is a wasteful number, since it uses less digits than its factorization.

30020031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1111862 (or 1111856 counting only the distinct ones).

The product of its (nonzero) digits is 18, while the sum is 9.

The square root of 30020031 is about 5479.0538416774. The cubic root of 30020031 is about 310.7923918473.

Adding to 30020031 its reverse (13002003), we get a palindrome (43022034).

The spelling of 30020031 in words is "thirty million, twenty thousand, thirty-one".