400143101 has 4 divisors (see below), whose sum is σ = 408656832. Its totient is φ = 391629372.

The previous prime is 400143047. The next prime is 400143181. The reversal of 400143101 is 101341004.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-400143101 is a prime.

It is a super-2 number, since 2×400143101² = 320229002555792402, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (400143181) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4256795 + ... + 4256888.

It is an arithmetic number, because the mean of its divisors is an integer number (102164208).

Almost surely, 2^400143101 is an apocalyptic number.

It is an amenable number.

400143101 is a deficient number, since it is larger than the sum of its proper divisors (8513731).

400143101 is an equidigital number, since it uses as much as digits as its factorization.

400143101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8513730.

The product of its (nonzero) digits is 48, while the sum is 14.

The square root of 400143101 is about 20003.5772050901. The cubic root of 400143101 is about 736.8941540175.

Adding to 400143101 its reverse (101341004), we get a palindrome (501484105).

The spelling of 400143101 in words is "four hundred million, one hundred forty-three thousand, one hundred one".