455168021 has 32 divisors (see below), whose sum is σ = 593049600. Its totient is φ = 338950080.

The previous prime is 455167997. The next prime is 455168023. The reversal of 455168021 is 120861554.

It is not a de Polignac number, because 455168021 - 2²⁶ = 388059157 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (455168023) by changing a digit.

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

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 229010 + ... + 230988.

It is an arithmetic number, because the mean of its divisors is an integer number (18532800).

Almost surely, 2^455168021 is an apocalyptic number.

It is an amenable number.

455168021 is a deficient number, since it is larger than the sum of its proper divisors (137881579).

455168021 is a wasteful number, since it uses less digits than its factorization.

455168021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2129.

The product of its (nonzero) digits is 9600, while the sum is 32.

The square root of 455168021 is about 21334.6671171593. The cubic root of 455168021 is about 769.2318313157.

The spelling of 455168021 in words is "four hundred fifty-five million, one hundred sixty-eight thousand, twenty-one".