45550031 has 2 divisors, whose sum is σ = 45550032. Its totient is φ = 45550030.

The previous prime is 45550019. The next prime is 45550033. The reversal of 45550031 is 13005554.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-45550031 is a prime.

It is a super-2 number, since 2×45550031² = 4149610648201922, which contains 22 as substring.

It is a Sophie Germain prime.

Together with 45550033, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 45549979 and 45550006.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (45550033) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 22775015 + 22775016.

It is an arithmetic number, because the mean of its divisors is an integer number (22775016).

Almost surely, 2^45550031 is an apocalyptic number.

45550031 is a deficient number, since it is larger than the sum of its proper divisors (1).

45550031 is an equidigital number, since it uses as much as digits as its factorization.

45550031 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1500, while the sum is 23.

The square root of 45550031 is about 6749.0763071697. The cubic root of 45550031 is about 357.1326521503.

Adding to 45550031 its reverse (13005554), we get a palindrome (58555585).

The spelling of 45550031 in words is "forty-five million, five hundred fifty thousand, thirty-one".