31061461 has 2 divisors, whose sum is σ = 31061462. Its totient is φ = 31061460.

The previous prime is 31061449. The next prime is 31061467. The reversal of 31061461 is 16416013.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 30041361 + 1020100 = 5481^2 + 1010^2 .

It is an emirp because it is prime and its reverse (16416013) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 31061461 - 2⁹ = 31060949 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (31061467) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15530730 + 15530731.

It is an arithmetic number, because the mean of its divisors is an integer number (15530731).

Almost surely, 2^31061461 is an apocalyptic number.

It is an amenable number.

31061461 is a deficient number, since it is larger than the sum of its proper divisors (1).

31061461 is an equidigital number, since it uses as much as digits as its factorization.

31061461 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 432, while the sum is 22.

The square root of 31061461 is about 5573.2809905836. The cubic root of 31061461 is about 314.3455329173.

Adding to 31061461 its reverse (16416013), we get a palindrome (47477474).

The spelling of 31061461 in words is "thirty-one million, sixty-one thousand, four hundred sixty-one".