31401201223144 has 32 divisors (see below), whose sum is σ = 59399709332040. Its totient is φ = 15561285376000.

The previous prime is 31401201223141. The next prime is 31401201223163. The reversal of 31401201223144 is 44132210210413.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 17348374559044 + 14052826664100 = 4165138^2 + 3748710^2 .

It is not an unprimeable number, because it can be changed into a prime (31401201223141) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 39564774 + ... + 40350634.

Almost surely, 2^{31401201223144} is an apocalyptic number.

It is an amenable number.

31401201223144 is a deficient number, since it is larger than the sum of its proper divisors (27998508108896).

31401201223144 is a wasteful number, since it uses less digits than its factorization.

31401201223144 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 830181 (or 830177 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 28.

Adding to 31401201223144 its reverse (44132210210413), we get a palindrome (75533411433557).

The spelling of 31401201223144 in words is "thirty-one trillion, four hundred one billion, two hundred one million, two hundred twenty-three thousand, one hundred forty-four".