31421052144 has 50 divisors (see below), whose sum is σ = 90941644640. Its totient is φ = 10473683616.

The previous prime is 31421052121. The next prime is 31421052193. The reversal of 31421052144 is 44125012413.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 12121024 + ... + 12123615.

Almost surely, 2^31421052144 is an apocalyptic number.

It is an amenable number.

31421052144 is an abundant number, since it is smaller than the sum of its proper divisors (59520592496).

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

31421052144 is a wasteful number, since it uses less digits than its factorization.

31421052144 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24244659 (or 24244644 counting only the distinct ones).

The product of its (nonzero) digits is 3840, while the sum is 27.

Adding to 31421052144 its reverse (44125012413), we get a palindrome (75546064557).

The spelling of 31421052144 in words is "thirty-one billion, four hundred twenty-one million, fifty-two thousand, one hundred forty-four".