400312101 has 16 divisors (see below), whose sum is σ = 610446848. Its totient is φ = 228582000.

The previous prime is 400312097. The next prime is 400312103. The reversal of 400312101 is 101213004.

It is a happy number.

It is not a de Polignac number, because 400312101 - 2² = 400312097 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (400312103) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 25926 + ... + 38376.

It is an arithmetic number, because the mean of its divisors is an integer number (38152928).

Almost surely, 2^400312101 is an apocalyptic number.

It is an amenable number.

400312101 is a deficient number, since it is larger than the sum of its proper divisors (210134747).

400312101 is a wasteful number, since it uses less digits than its factorization.

400312101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13992.

The product of its (nonzero) digits is 24, while the sum is 12.

The square root of 400312101 is about 20007.8010036086. The cubic root of 400312101 is about 736.9978815618.

Adding to 400312101 its reverse (101213004), we get a palindrome (501525105).

The spelling of 400312101 in words is "four hundred million, three hundred twelve thousand, one hundred one".