31144304221 has 8 divisors (see below), whose sum is σ = 31632149120. Its totient is φ = 30658799808.

The previous prime is 31144304207. The next prime is 31144304227. The reversal of 31144304221 is 12240344113.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 31144304221 - 2⁹ = 31144303709 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31144304227) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 558291 + ... + 611536.

It is an arithmetic number, because the mean of its divisors is an integer number (3954018640).

Almost surely, 2^31144304221 is an apocalyptic number.

It is an amenable number.

31144304221 is a deficient number, since it is larger than the sum of its proper divisors (487844899).

31144304221 is a wasteful number, since it uses less digits than its factorization.

31144304221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1170243.

The product of its (nonzero) digits is 2304, while the sum is 25.

Adding to 31144304221 its reverse (12240344113), we get a palindrome (43384648334).

The spelling of 31144304221 in words is "thirty-one billion, one hundred forty-four million, three hundred four thousand, two hundred twenty-one".