31534650061 has 2 divisors, whose sum is σ = 31534650062. Its totient is φ = 31534650060.

The previous prime is 31534650031. The next prime is 31534650137. The reversal of 31534650061 is 16005643513.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 28054240036 + 3480410025 = 167494^2 + 58995^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-31534650061 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 31534649999 and 31534650026.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (31534650031) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15767325030 + 15767325031.

It is an arithmetic number, because the mean of its divisors is an integer number (15767325031).

Almost surely, 2^31534650061 is an apocalyptic number.

It is an amenable number.

31534650061 is a deficient number, since it is larger than the sum of its proper divisors (1).

31534650061 is an equidigital number, since it uses as much as digits as its factorization.

31534650061 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 32400, while the sum is 34.

The spelling of 31534650061 in words is "thirty-one billion, five hundred thirty-four million, six hundred fifty thousand, sixty-one".