401531323 has 4 divisors (see below), whose sum is σ = 401575240. Its totient is φ = 401487408.

The previous prime is 401531321. The next prime is 401531353. The reversal of 401531323 is 323135104.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 401531323 - 2¹ = 401531321 is a prime.

It is a super-2 number, since 2×401531323² = 322454806700260658, 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 = 401531294 and 401531303.

It is not an unprimeable number, because it can be changed into a prime (401531321) 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, 2490 + ... + 28447.

It is an arithmetic number, because the mean of its divisors is an integer number (100393810).

Almost surely, 2^401531323 is an apocalyptic number.

401531323 is a deficient number, since it is larger than the sum of its proper divisors (43917).

401531323 is a wasteful number, since it uses less digits than its factorization.

401531323 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43916.

The product of its (nonzero) digits is 1080, while the sum is 22.

The square root of 401531323 is about 20038.2465051212. The cubic root of 401531323 is about 737.7453427915.

Adding to 401531323 its reverse (323135104), we get a palindrome (724666427).

The spelling of 401531323 in words is "four hundred one million, five hundred thirty-one thousand, three hundred twenty-three".