45451213 has 2 divisors, whose sum is σ = 45451214. Its totient is φ = 45451212.

The previous prime is 45451201. The next prime is 45451261. The reversal of 45451213 is 31215454.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 32512804 + 12938409 = 5702^2 + 3597^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-45451213 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (45451513) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 22725606 + 22725607.

It is an arithmetic number, because the mean of its divisors is an integer number (22725607).

Almost surely, 2^45451213 is an apocalyptic number.

It is an amenable number.

45451213 is a deficient number, since it is larger than the sum of its proper divisors (1).

45451213 is an equidigital number, since it uses as much as digits as its factorization.

45451213 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2400, while the sum is 25.

The square root of 45451213 is about 6741.7514786589. The cubic root of 45451213 is about 356.8742060337.

Adding to 45451213 its reverse (31215454), we get a palindrome (76666667).

The spelling of 45451213 in words is "forty-five million, four hundred fifty-one thousand, two hundred thirteen".