31222214144 has 80 divisors (see below), whose sum is σ = 72058106736. Its totient is φ = 13357056000.

The previous prime is 31222214143. The next prime is 31222214147. The reversal of 31222214144 is 44141222213.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31222214143) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 67307 + ... + 258794.

Almost surely, 2^31222214144 is an apocalyptic number.

31222214144 is a gapful number since it is divisible by the number (34) formed by its first and last digit.

It is an amenable number.

31222214144 is an abundant number, since it is smaller than the sum of its proper divisors (40835892592).

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

31222214144 is a wasteful number, since it uses less digits than its factorization.

31222214144 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 326147 (or 326131 counting only the distinct ones).

The product of its digits is 3072, while the sum is 26.

Adding to 31222214144 its reverse (44141222213), we get a palindrome (75363436357).

The spelling of 31222214144 in words is "thirty-one billion, two hundred twenty-two million, two hundred fourteen thousand, one hundred forty-four".