31103214220 has 48 divisors (see below), whose sum is σ = 70387960608. Its totient is φ = 11476615680.

The previous prime is 31103214217. The next prime is 31103214223. The reversal of 31103214220 is 2241230113.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (31103214217) and next prime (31103214223).

It is not an unprimeable number, because it can be changed into a prime (31103214223) 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 15 ways as a sum of consecutive naturals, for example, 358992 + ... + 437128.

It is an arithmetic number, because the mean of its divisors is an integer number (1466415846).

Almost surely, 2^31103214220 is an apocalyptic number.

It is an amenable number.

31103214220 is an abundant number, since it is smaller than the sum of its proper divisors (39284746388).

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

31103214220 is a wasteful number, since it uses less digits than its factorization.

31103214220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 79690 (or 79688 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 19.

Adding to 31103214220 its reverse (2241230113), we get a palindrome (33344444333).

The spelling of 31103214220 in words is "thirty-one billion, one hundred three million, two hundred fourteen thousand, two hundred twenty".