31406422144 has 16 divisors (see below), whose sum is σ = 62567481870. Its totient is φ = 15703211008.

The previous prime is 31406422141. The next prime is 31406422171. The reversal of 31406422144 is 44122460413.

It can be written as a sum of positive squares in only one way, i.e., 30945031744 + 461390400 = 175912^2 + 21480^2 .

It is a tau number, because it is divible by the number of its divisors (16).

It is not an unprimeable number, because it can be changed into a prime (31406422141) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 122681209 + ... + 122681464.

Almost surely, 2^31406422144 is an apocalyptic number.

It is an amenable number.

31406422144 is a deficient number, since it is larger than the sum of its proper divisors (31161059726).

31406422144 is an equidigital number, since it uses as much as digits as its factorization.

31406422144 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 245362687 (or 245362675 counting only the distinct ones).

The product of its (nonzero) digits is 18432, while the sum is 31.

Adding to 31406422144 its reverse (44122460413), we get a palindrome (75528882557).

The spelling of 31406422144 in words is "thirty-one billion, four hundred six million, four hundred twenty-two thousand, one hundred forty-four".