31423356149 has 2 divisors, whose sum is σ = 31423356150. Its totient is φ = 31423356148.

The previous prime is 31423356091. The next prime is 31423356179. The reversal of 31423356149 is 94165332413.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 31417562500 + 5793649 = 177250^2 + 2407^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-31423356149 is a prime.

It is a super-2 number, since 2×31423356149² (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 (31423356179) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15711678074 + 15711678075.

It is an arithmetic number, because the mean of its divisors is an integer number (15711678075).

Almost surely, 2^31423356149 is an apocalyptic number.

It is an amenable number.

31423356149 is a deficient number, since it is larger than the sum of its proper divisors (1).

31423356149 is an equidigital number, since it uses as much as digits as its factorization.

31423356149 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 233280, while the sum is 41.

The spelling of 31423356149 in words is "thirty-one billion, four hundred twenty-three million, three hundred fifty-six thousand, one hundred forty-nine".