31123000230 has 128 divisors (see below), whose sum is σ = 87277132800. Its totient is φ = 7100029440.

The previous prime is 31123000211. The next prime is 31123000243. The reversal of 31123000230 is 3200032113.

It is a super-2 number, since 2×31123000230² (a number of 22 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 5872942 + ... + 5878238.

It is an arithmetic number, because the mean of its divisors is an integer number (681852600).

Almost surely, 2^31123000230 is an apocalyptic number.

31123000230 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 31123000230, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (43638566400).

31123000230 is an abundant number, since it is smaller than the sum of its proper divisors (56154132570).

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

31123000230 is a wasteful number, since it uses less digits than its factorization.

31123000230 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5899 (or 5885 counting only the distinct ones).

The product of its (nonzero) digits is 108, while the sum is 15.

Adding to 31123000230 its reverse (3200032113), we get a palindrome (34323032343).

The spelling of 31123000230 in words is "thirty-one billion, one hundred twenty-three million, two hundred thirty", and thus it is an aban number.