31136301481 has 2 divisors, whose sum is σ = 31136301482. Its totient is φ = 31136301480.

The previous prime is 31136301463. The next prime is 31136301517. The reversal of 31136301481 is 18410363113.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 19848301456 + 11288000025 = 140884^2 + 106245^2 .

It is a cyclic number.

It is not a de Polignac number, because 31136301481 - 2²¹ = 31134204329 is a prime.

It is a super-2 number, since 2×31136301481² (a number of 22 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (31136307481) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15568150740 + 15568150741.

It is an arithmetic number, because the mean of its divisors is an integer number (15568150741).

Almost surely, 2^31136301481 is an apocalyptic number.

It is an amenable number.

31136301481 is a deficient number, since it is larger than the sum of its proper divisors (1).

31136301481 is an equidigital number, since it uses as much as digits as its factorization.

31136301481 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5184, while the sum is 31.

Adding to 31136301481 its reverse (18410363113), we get a palindrome (49546664594).

The spelling of 31136301481 in words is "thirty-one billion, one hundred thirty-six million, three hundred one thousand, four hundred eighty-one".