400055519 has 2 divisors, whose sum is σ = 400055520. Its totient is φ = 400055518.

The previous prime is 400055503. The next prime is 400055567. The reversal of 400055519 is 915550004.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 400055519 - 2⁴ = 400055503 is a prime.

It is a super-2 number, since 2×400055519² = 320088836564718722, which contains 22 as substring.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 400055491 and 400055500.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (400055569) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 200027759 + 200027760.

It is an arithmetic number, because the mean of its divisors is an integer number (200027760).

Almost surely, 2^400055519 is an apocalyptic number.

400055519 is a deficient number, since it is larger than the sum of its proper divisors (1).

400055519 is an equidigital number, since it uses as much as digits as its factorization.

400055519 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4500, while the sum is 29.

The square root of 400055519 is about 20001.3879268415. The cubic root of 400055519 is about 736.8403871085.

The spelling of 400055519 in words is "four hundred million, fifty-five thousand, five hundred nineteen".