455438217 has 32 divisors (see below), whose sum is σ = 674031232. Its totient is φ = 271724544.

The previous prime is 455438213. The next prime is 455438231. The reversal of 455438217 is 712834554.

It is not a de Polignac number, because 455438217 - 2² = 455438213 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (455438213) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 789033 + ... + 789609.

It is an arithmetic number, because the mean of its divisors is an integer number (21063476).

Almost surely, 2^455438217 is an apocalyptic number.

It is an amenable number.

455438217 is a deficient number, since it is larger than the sum of its proper divisors (218593015).

455438217 is a wasteful number, since it uses less digits than its factorization.

455438217 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1177.

The product of its digits is 134400, while the sum is 39.

The square root of 455438217 is about 21340.9985005388. The cubic root of 455438217 is about 769.3840112005.

The spelling of 455438217 in words is "four hundred fifty-five million, four hundred thirty-eight thousand, two hundred seventeen".