31321305030 has 16 divisors (see below), whose sum is σ = 75171132144. Its totient is φ = 8352348000.

The previous prime is 31321305013. The next prime is 31321305073. The reversal of 31321305030 is 3050312313.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 31321304988 and 31321305006.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 522021721 + ... + 522021780.

It is an arithmetic number, because the mean of its divisors is an integer number (4698195759).

Almost surely, 2^31321305030 is an apocalyptic number.

31321305030 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

31321305030 is an abundant number, since it is smaller than the sum of its proper divisors (43849827114).

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

31321305030 is a wasteful number, since it uses less digits than its factorization.

31321305030 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1044043511.

The product of its (nonzero) digits is 810, while the sum is 21.

Adding to 31321305030 its reverse (3050312313), we get a palindrome (34371617343).

The spelling of 31321305030 in words is "thirty-one billion, three hundred twenty-one million, three hundred five thousand, thirty".