31102030 has 16 divisors (see below), whose sum is σ = 56330064. Its totient is φ = 12363840.

The previous prime is 31102013. The next prime is 31102037. The reversal of 31102030 is 3020113.

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 = 31101998 and 31102016.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31102037) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7911 + ... + 11170.

It is an arithmetic number, because the mean of its divisors is an integer number (3520629).

Almost surely, 2^31102030 is an apocalyptic number.

31102030 is a deficient number, since it is larger than the sum of its proper divisors (25228034).

31102030 is a wasteful number, since it uses less digits than its factorization.

31102030 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19251.

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

The square root of 31102030 is about 5576.9194005293. The cubic root of 31102030 is about 314.4823276837.

Adding to 31102030 its reverse (3020113), we get a palindrome (34122143).

The spelling of 31102030 in words is "thirty-one million, one hundred two thousand, thirty".