31303223130 has 16 divisors (see below), whose sum is σ = 75127735584. Its totient is φ = 8347526160.

The previous prime is 31303223117. The next prime is 31303223137. The reversal of 31303223130 is 3132230313.

It is a junction number, because it is equal to n+sod(n) for n = 31303223097 and 31303223106.

It is not an unprimeable number, because it can be changed into a prime (31303223137) 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, 521720356 + ... + 521720415.

It is an arithmetic number, because the mean of its divisors is an integer number (4695483474).

Almost surely, 2^31303223130 is an apocalyptic number.

31303223130 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

31303223130 is an abundant number, since it is smaller than the sum of its proper divisors (43824512454).

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

31303223130 is a wasteful number, since it uses less digits than its factorization.

31303223130 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1043440781.

The product of its (nonzero) digits is 972, while the sum is 21.

Adding to 31303223130 its reverse (3132230313), we get a palindrome (34435453443).

The spelling of 31303223130 in words is "thirty-one billion, three hundred three million, two hundred twenty-three thousand, one hundred thirty".