400231131331 has 8 divisors (see below), whose sum is σ = 401560233984. Its totient is φ = 398902299720.

The previous prime is 400231131329. The next prime is 400231131343. The reversal of 400231131331 is 133131132004.

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

It is a cyclic number.

It is not a de Polignac number, because 400231131331 - 2¹ = 400231131329 is a prime.

It is a super-3 number, since 3×400231131331³ (a number of 36 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (400231131361) 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, 3141780 + ... + 3266686.

It is an arithmetic number, because the mean of its divisors is an integer number (50195029248).

Almost surely, 2^400231131331 is an apocalyptic number.

400231131331 is a deficient number, since it is larger than the sum of its proper divisors (1329102653).

400231131331 is a wasteful number, since it uses less digits than its factorization.

400231131331 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 135521.

The product of its (nonzero) digits is 648, while the sum is 22.

Adding to 400231131331 its reverse (133131132004), we get a palindrome (533362263335).

The spelling of 400231131331 in words is "four hundred billion, two hundred thirty-one million, one hundred thirty-one thousand, three hundred thirty-one".