31440212541 has 12 divisors (see below), whose sum is σ = 45559668960. Its totient is φ = 20892743880.

The previous prime is 31440212537. The next prime is 31440212563. The reversal of 31440212541 is 14521204413.

31440212541 is a `hidden beast` number, since 3 + 1 + 4 + 402 + 1 + 254 + 1 = 666.

It is not a de Polignac number, because 31440212541 - 2² = 31440212537 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31440211541) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 5613531 + ... + 5619128.

It is an arithmetic number, because the mean of its divisors is an integer number (3796639080).

Almost surely, 2^31440212541 is an apocalyptic number.

It is an amenable number.

31440212541 is a deficient number, since it is larger than the sum of its proper divisors (14119456419).

31440212541 is a wasteful number, since it uses less digits than its factorization.

31440212541 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11232976 (or 11232973 counting only the distinct ones).

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

Adding to 31440212541 its reverse (14521204413), we get a palindrome (45961416954).

The spelling of 31440212541 in words is "thirty-one billion, four hundred forty million, two hundred twelve thousand, five hundred forty-one".