31440201061 has 2 divisors, whose sum is σ = 31440201062. Its totient is φ = 31440201060.

The previous prime is 31440201041. The next prime is 31440201161. The reversal of 31440201061 is 16010204413.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 15791692225 + 15648508836 = 125665^2 + 125094^2 .

It is a cyclic number.

It is not a de Polignac number, because 31440201061 - 2⁹ = 31440200549 is a prime.

It is a super-2 number, since 2×31440201061² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (31440201041) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15720100530 + 15720100531.

It is an arithmetic number, because the mean of its divisors is an integer number (15720100531).

Almost surely, 2^31440201061 is an apocalyptic number.

It is an amenable number.

31440201061 is a deficient number, since it is larger than the sum of its proper divisors (1).

31440201061 is an equidigital number, since it uses as much as digits as its factorization.

31440201061 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 576, while the sum is 22.

Adding to 31440201061 its reverse (16010204413), we get a palindrome (47450405474).

The spelling of 31440201061 in words is "thirty-one billion, four hundred forty million, two hundred one thousand, sixty-one".