400421501453 has 2 divisors, whose sum is σ = 400421501454. Its totient is φ = 400421501452.

The previous prime is 400421501407. The next prime is 400421501471. The reversal of 400421501453 is 354105124004.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 376556504164 + 23864997289 = 613642^2 + 154483^2 .

It is a cyclic number.

It is not a de Polignac number, because 400421501453 - 2³⁸ = 125543594509 is a prime.

It is a super-2 number, since 2×400421501453² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (400421401453) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 200210750726 + 200210750727.

It is an arithmetic number, because the mean of its divisors is an integer number (200210750727).

Almost surely, 2^400421501453 is an apocalyptic number.

It is an amenable number.

400421501453 is a deficient number, since it is larger than the sum of its proper divisors (1).

400421501453 is an equidigital number, since it uses as much as digits as its factorization.

400421501453 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 9600, while the sum is 29.

Adding to 400421501453 its reverse (354105124004), we get a palindrome (754526625457).

The spelling of 400421501453 in words is "four hundred billion, four hundred twenty-one million, five hundred one thousand, four hundred fifty-three".