400143371 has 2 divisors, whose sum is σ = 400143372. Its totient is φ = 400143370.

The previous prime is 400143349. The next prime is 400143407. The reversal of 400143371 is 173341004.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 400143371 - 2⁶ = 400143307 is a prime.

It is a super-2 number, since 2×400143371² = 320229434710487282, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (400143301) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 200071685 + 200071686.

It is an arithmetic number, because the mean of its divisors is an integer number (200071686).

Almost surely, 2^400143371 is an apocalyptic number.

400143371 is a deficient number, since it is larger than the sum of its proper divisors (1).

400143371 is an equidigital number, since it uses as much as digits as its factorization.

400143371 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1008, while the sum is 23.

The square root of 400143371 is about 20003.5839538819. The cubic root of 400143371 is about 736.8943197593.

Adding to 400143371 its reverse (173341004), we get a palindrome (573484375).

The spelling of 400143371 in words is "four hundred million, one hundred forty-three thousand, three hundred seventy-one".