31442221224 has 64 divisors (see below), whose sum is σ = 87414792000. Its totient is φ = 10471705920.

The previous prime is 31442221199. The next prime is 31442221249. The reversal of 31442221224 is 42212224413.

It is a happy number.

31442221224 is a `hidden beast` number, since 3 + 1 + 4 + 422 + 212 + 24 = 666.

It is an interprime number because it is at equal distance from previous prime (31442221199) and next prime (31442221249).

It is a super-2 number, since 2×31442221224² (a number of 22 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a nude number because it is divisible by every one of its digits.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 190782 + ... + 315090.

It is an arithmetic number, because the mean of its divisors is an integer number (1365856125).

Almost surely, 2^31442221224 is an apocalyptic number.

It is an amenable number.

31442221224 is an abundant number, since it is smaller than the sum of its proper divisors (55972570776).

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

31442221224 is a wasteful number, since it uses less digits than its factorization.

31442221224 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 125495 (or 125485 counting only the distinct ones).

The product of its digits is 6144, while the sum is 27.

Adding to 31442221224 its reverse (42212224413), we get a palindrome (73654445637).

The spelling of 31442221224 in words is "thirty-one billion, four hundred forty-two million, two hundred twenty-one thousand, two hundred twenty-four".