31361051 has 2 divisors, whose sum is σ = 31361052. Its totient is φ = 31361050.

The previous prime is 31361047. The next prime is 31361059. The reversal of 31361051 is 15016313.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 31361051 - 2² = 31361047 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (31361059) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15680525 + 15680526.

It is an arithmetic number, because the mean of its divisors is an integer number (15680526).

Almost surely, 2^31361051 is an apocalyptic number.

31361051 is a deficient number, since it is larger than the sum of its proper divisors (1).

31361051 is an equidigital number, since it uses as much as digits as its factorization.

31361051 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 270, while the sum is 20.

The square root of 31361051 is about 5600.0938384995. The cubic root of 31361051 is about 315.3529293614.

Adding to 31361051 its reverse (15016313), we get a palindrome (46377364).

The spelling of 31361051 in words is "thirty-one million, three hundred sixty-one thousand, fifty-one".