400143355 has 4 divisors (see below), whose sum is σ = 480172032. Its totient is φ = 320114680.

The previous prime is 400143349. The next prime is 400143371. The reversal of 400143355 is 553341004.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 400143355 - 2¹¹ = 400141307 is a prime.

It is a super-2 number, since 2×400143355² = 320229409101312050, which contains 22 as substring.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 40014331 + ... + 40014340.

It is an arithmetic number, because the mean of its divisors is an integer number (120043008).

Almost surely, 2^400143355 is an apocalyptic number.

400143355 is a deficient number, since it is larger than the sum of its proper divisors (80028677).

400143355 is an equidigital number, since it uses as much as digits as its factorization.

400143355 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 80028676.

The product of its (nonzero) digits is 3600, while the sum is 25.

The square root of 400143355 is about 20003.5835539535. The cubic root of 400143355 is about 736.8943099376.

Adding to 400143355 its reverse (553341004), we get a palindrome (953484359).

The spelling of 400143355 in words is "four hundred million, one hundred forty-three thousand, three hundred fifty-five".