31012030 has 32 divisors (see below), whose sum is σ = 65286144. Its totient is φ = 10384416.

The previous prime is 31012021. The next prime is 31012039. The reversal of 31012030 is 3021013.

It is an interprime number because it is at equal distance from previous prime (31012021) and next prime (31012039).

It is a Harshad number since it is a multiple of its sum of digits (10).

It is a junction number, because it is equal to n+sod(n) for n = 31011998 and 31012016.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31012039) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2142 + ... + 8161.

It is an arithmetic number, because the mean of its divisors is an integer number (2040192).

Almost surely, 2^31012030 is an apocalyptic number.

31012030 is an abundant number, since it is smaller than the sum of its proper divisors (34274114).

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

31012030 is a wasteful number, since it uses less digits than its factorization.

31012030 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10360.

The product of its (nonzero) digits is 18, while the sum is 10.

The square root of 31012030 is about 5568.8445839330. The cubic root of 31012030 is about 314.1786952627.

Adding to 31012030 its reverse (3021013), we get a palindrome (34033043).

The spelling of 31012030 in words is "thirty-one million, twelve thousand, thirty".