31220133030 has 24 divisors (see below), whose sum is σ = 81172346112. Its totient is φ = 8325368784.

The previous prime is 31220133017. The next prime is 31220133031. The reversal of 31220133030 is 3033102213.

31220133030 is a `hidden beast` number, since 312 + 20 + 1 + 330 + 3 + 0 = 666.

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 = 31220132994 and 31220133012.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31220133031) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 173445094 + ... + 173445273.

It is an arithmetic number, because the mean of its divisors is an integer number (3382181088).

Almost surely, 2^31220133030 is an apocalyptic number.

31220133030 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

31220133030 is an abundant number, since it is smaller than the sum of its proper divisors (49952213082).

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

31220133030 is a wasteful number, since it uses less digits than its factorization.

31220133030 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 346890380 (or 346890377 counting only the distinct ones).

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

Adding to 31220133030 its reverse (3033102213), we get a palindrome (34253235243).

The spelling of 31220133030 in words is "thirty-one billion, two hundred twenty million, one hundred thirty-three thousand, thirty".