451211221457 has 2 divisors, whose sum is σ = 451211221458. Its totient is φ = 451211221456.

The previous prime is 451211221453. The next prime is 451211221493. The reversal of 451211221457 is 754122112154.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 451159395856 + 51825601 = 671684^2 + 7199^2 .

It is a cyclic number.

It is not a de Polignac number, because 451211221457 - 2² = 451211221453 is a prime.

It is not a weakly prime, because it can be changed into another prime (451211221451) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 225605610728 + 225605610729.

It is an arithmetic number, because the mean of its divisors is an integer number (225605610729).

Almost surely, 2^451211221457 is an apocalyptic number.

It is an amenable number.

451211221457 is a deficient number, since it is larger than the sum of its proper divisors (1).

451211221457 is an equidigital number, since it uses as much as digits as its factorization.

451211221457 is an evil number, because the sum of its binary digits is even.

The product of its digits is 22400, while the sum is 35.

The spelling of 451211221457 in words is "four hundred fifty-one billion, two hundred eleven million, two hundred twenty-one thousand, four hundred fifty-seven".