31434403181 has 2 divisors, whose sum is σ = 31434403182. Its totient is φ = 31434403180.

The previous prime is 31434403171. The next prime is 31434403211. The reversal of 31434403181 is 18130443413.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 18951927556 + 12482475625 = 137666^2 + 111725^2 .

It is a cyclic number.

It is not a de Polignac number, because 31434403181 - 2²⁶ = 31367294317 is a prime.

It is a super-2 number, since 2×31434403181² (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 (31434403141) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15717201590 + 15717201591.

It is an arithmetic number, because the mean of its divisors is an integer number (15717201591).

Almost surely, 2^31434403181 is an apocalyptic number.

It is an amenable number.

31434403181 is a deficient number, since it is larger than the sum of its proper divisors (1).

31434403181 is an equidigital number, since it uses as much as digits as its factorization.

31434403181 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 13824, while the sum is 32.

Adding to 31434403181 its reverse (18130443413), we get a palindrome (49564846594).

The spelling of 31434403181 in words is "thirty-one billion, four hundred thirty-four million, four hundred three thousand, one hundred eighty-one".