31242201440 has 24 divisors (see below), whose sum is σ = 73809701280. Its totient is φ = 12496880512.

The previous prime is 31242201343. The next prime is 31242201461. The reversal of 31242201440 is 4410224213.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 97631720 + ... + 97632039.

It is an arithmetic number, because the mean of its divisors is an integer number (3075404220).

Almost surely, 2^31242201440 is an apocalyptic number.

It is an amenable number.

31242201440 is an abundant number, since it is smaller than the sum of its proper divisors (42567499840).

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

31242201440 is a wasteful number, since it uses less digits than its factorization.

31242201440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 195263774 (or 195263766 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 23.

Adding to 31242201440 its reverse (4410224213), we get a palindrome (35652425653).

The spelling of 31242201440 in words is "thirty-one billion, two hundred forty-two million, two hundred one thousand, four hundred forty".