31244420160 has 84 divisors (see below), whose sum is σ = 107467796748. Its totient is φ = 8331844608.

The previous prime is 31244420153. The next prime is 31244420183. The reversal of 31244420160 is 6102444213.

It is a happy number.

31244420160 is a `hidden beast` number, since 3 + 12 + 444 + 201 + 6 + 0 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 9867640896 + 21376779264 = 99336^2 + 146208^2 .

It is a super-2 number, since 2×31244420160² (a number of 22 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 5421499 + ... + 5427258.

Almost surely, 2^31244420160 is an apocalyptic number.

31244420160 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

31244420160 is an abundant number, since it is smaller than the sum of its proper divisors (76223376588).

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

31244420160 is a wasteful number, since it uses less digits than its factorization.

31244420160 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10848780 (or 10848767 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 27.

Adding to 31244420160 its reverse (6102444213), we get a palindrome (37346864373).

The spelling of 31244420160 in words is "thirty-one billion, two hundred forty-four million, four hundred twenty thousand, one hundred sixty".