31032311661031 has 2 divisors, whose sum is σ = 31032311661032. Its totient is φ = 31032311661030.

The previous prime is 31032311661007. The next prime is 31032311661049. The reversal of 31032311661031 is 13016611323013.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 31032311661031 - 2¹⁷ = 31032311529959 is a prime.

It is a super-2 number, since 2×31032311661031² (a number of 28 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 31032311660984 and 31032311661002.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (31032311661731) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15516155830515 + 15516155830516.

It is an arithmetic number, because the mean of its divisors is an integer number (15516155830516).

Almost surely, 2^{31032311661031} is an apocalyptic number.

31032311661031 is a deficient number, since it is larger than the sum of its proper divisors (1).

31032311661031 is an equidigital number, since it uses as much as digits as its factorization.

31032311661031 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5832, while the sum is 31.

Adding to 31032311661031 its reverse (13016611323013), we get a palindrome (44048922984044).

The spelling of 31032311661031 in words is "thirty-one trillion, thirty-two billion, three hundred eleven million, six hundred sixty-one thousand, thirty-one".