45212117 has 2 divisors, whose sum is σ = 45212118. Its totient is φ = 45212116.

The previous prime is 45212093. The next prime is 45212119. The reversal of 45212117 is 71121254.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 40018276 + 5193841 = 6326^2 + 2279^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-45212117 is a prime.

Together with 45212119, 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 = 45212092 and 45212101.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (45212119) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 22606058 + 22606059.

It is an arithmetic number, because the mean of its divisors is an integer number (22606059).

Almost surely, 2^45212117 is an apocalyptic number.

It is an amenable number.

45212117 is a deficient number, since it is larger than the sum of its proper divisors (1).

45212117 is an equidigital number, since it uses as much as digits as its factorization.

45212117 is an evil number, because the sum of its binary digits is even.

The product of its digits is 560, while the sum is 23.

The square root of 45212117 is about 6723.9956127291. The cubic root of 45212117 is about 356.2473268703.

The spelling of 45212117 in words is "forty-five million, two hundred twelve thousand, one hundred seventeen".