31402143061 has 2 divisors, whose sum is σ = 31402143062. Its totient is φ = 31402143060.

The previous prime is 31402143037. The next prime is 31402143083. The reversal of 31402143061 is 16034120413.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 31198510161 + 203632900 = 176631^2 + 14270^2 .

It is a cyclic number.

It is not a de Polignac number, because 31402143061 - 2²⁷ = 31267925333 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (31402143361) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15701071530 + 15701071531.

It is an arithmetic number, because the mean of its divisors is an integer number (15701071531).

Almost surely, 2^31402143061 is an apocalyptic number.

It is an amenable number.

31402143061 is a deficient number, since it is larger than the sum of its proper divisors (1).

31402143061 is an equidigital number, since it uses as much as digits as its factorization.

31402143061 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1728, while the sum is 25.

Adding to 31402143061 its reverse (16034120413), we get a palindrome (47436263474).

The spelling of 31402143061 in words is "thirty-one billion, four hundred two million, one hundred forty-three thousand, sixty-one".