31068451 has 2 divisors, whose sum is σ = 31068452. Its totient is φ = 31068450.

The previous prime is 31068371. The next prime is 31068461. The reversal of 31068451 is 15486013.

It is a strong prime.

It is an emirp because it is prime and its reverse (15486013) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-31068451 is a prime.

It is not a weakly prime, because it can be changed into another prime (31068461) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a good prime.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15534225 + 15534226.

It is an arithmetic number, because the mean of its divisors is an integer number (15534226).

Almost surely, 2^31068451 is an apocalyptic number.

31068451 is a deficient number, since it is larger than the sum of its proper divisors (1).

31068451 is an equidigital number, since it uses as much as digits as its factorization.

31068451 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2880, while the sum is 28.

The square root of 31068451 is about 5573.9080544982. The cubic root of 31068451 is about 314.3691110149.

The spelling of 31068451 in words is "thirty-one million, sixty-eight thousand, four hundred fifty-one".