31222424420 has 48 divisors (see below), whose sum is σ = 71693911296. Its totient is φ = 11327232000.

The previous prime is 31222424419. The next prime is 31222424423. The reversal of 31222424420 is 2442422213.

It is a super-2 number, since 2×31222424420² (a number of 22 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 31222424420.

It is not an unprimeable number, because it can be changed into a prime (31222424423) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 69821 + ... + 259460.

It is an arithmetic number, because the mean of its divisors is an integer number (1493623152).

Almost surely, 2^31222424420 is an apocalyptic number.

It is an amenable number.

31222424420 is an abundant number, since it is smaller than the sum of its proper divisors (40471486876).

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

31222424420 is a wasteful number, since it uses less digits than its factorization.

31222424420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 329732 (or 329730 counting only the distinct ones).

The product of its (nonzero) digits is 6144, while the sum is 26.

Adding to 31222424420 its reverse (2442422213), we get a palindrome (33664846633).

The spelling of 31222424420 in words is "thirty-one billion, two hundred twenty-two million, four hundred twenty-four thousand, four hundred twenty".