400331013 has 8 divisors (see below), whose sum is σ = 533874528. Its totient is φ = 266837424.

The previous prime is 400330979. The next prime is 400331021. The reversal of 400331013 is 310133004.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 400331013 - 2¹⁰ = 400329989 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 400330983 and 400331001.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (400331033) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 14670 + ... + 31872.

It is an arithmetic number, because the mean of its divisors is an integer number (66734316).

Almost surely, 2^400331013 is an apocalyptic number.

It is an amenable number.

400331013 is a deficient number, since it is larger than the sum of its proper divisors (133543515).

400331013 is a wasteful number, since it uses less digits than its factorization.

400331013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24963.

The product of its (nonzero) digits is 108, while the sum is 15.

The square root of 400331013 is about 20008.2736136829. The cubic root of 400331013 is about 737.0094874100.

Adding to 400331013 its reverse (310133004), we get a palindrome (710464017).

The spelling of 400331013 in words is "four hundred million, three hundred thirty-one thousand, thirteen".