400241831 has 4 divisors (see below), whose sum is σ = 436627464. Its totient is φ = 363856200.

The previous prime is 400241749. The next prime is 400241833. The reversal of 400241831 is 138142004.

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

It is a cyclic number.

It is not a de Polignac number, because 400241831 - 2¹⁴ = 400225447 is a prime.

It is a super-2 number, since 2×400241831² = 320387046564465122, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 400241797 and 400241806.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (400241833) 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, 18192800 + ... + 18192821.

It is an arithmetic number, because the mean of its divisors is an integer number (109156866).

Almost surely, 2^400241831 is an apocalyptic number.

400241831 is a deficient number, since it is larger than the sum of its proper divisors (36385633).

400241831 is a wasteful number, since it uses less digits than its factorization.

400241831 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36385632.

The product of its (nonzero) digits is 768, while the sum is 23.

The square root of 400241831 is about 20006.0448614912. The cubic root of 400241831 is about 736.9547553180.

Adding to 400241831 its reverse (138142004), we get a palindrome (538383835).

The spelling of 400241831 in words is "four hundred million, two hundred forty-one thousand, eight hundred thirty-one".