450711821 has 16 divisors (see below), whose sum is σ = 532466688. Its totient is φ = 373334400.

The previous prime is 450711817. The next prime is 450711857. The reversal of 450711821 is 128117054.

It is a cyclic number.

It is not a de Polignac number, because 450711821 - 2² = 450711817 is a prime.

It is a super-2 number, since 2×450711821² = 406282291178272082, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (450711421) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 258011 + ... + 259751.

It is an arithmetic number, because the mean of its divisors is an integer number (33279168).

Almost surely, 2^450711821 is an apocalyptic number.

It is an amenable number.

450711821 is a deficient number, since it is larger than the sum of its proper divisors (81754867).

450711821 is a wasteful number, since it uses less digits than its factorization.

450711821 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2972.

The product of its (nonzero) digits is 2240, while the sum is 29.

The square root of 450711821 is about 21229.9745878322. The cubic root of 450711821 is about 766.7132751963.

Adding to 450711821 its reverse (128117054), we get a palindrome (578828875).

The spelling of 450711821 in words is "four hundred fifty million, seven hundred eleven thousand, eight hundred twenty-one".