31230231030 has 48 divisors (see below), whose sum is σ = 85472215920. Its totient is φ = 7889742144.

The previous prime is 31230230971. The next prime is 31230231031. The reversal of 31230231030 is 3013203213.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 31230230994 and 31230231012.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31230231031) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 9129937 + ... + 9133356.

It is an arithmetic number, because the mean of its divisors is an integer number (1780671165).

Almost surely, 2^31230231030 is an apocalyptic number.

31230231030 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

31230231030 is an abundant number, since it is smaller than the sum of its proper divisors (54241984890).

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

31230231030 is a wasteful number, since it uses less digits than its factorization.

31230231030 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18263325 (or 18263322 counting only the distinct ones).

The product of its (nonzero) digits is 324, while the sum is 18.

Adding to 31230231030 its reverse (3013203213), we get a palindrome (34243434243).

The spelling of 31230231030 in words is "thirty-one billion, two hundred thirty million, two hundred thirty-one thousand, thirty".