400031233541 has 4 divisors (see below), whose sum is σ = 406811424000. Its totient is φ = 393251043084.

The previous prime is 400031233439. The next prime is 400031233559. The reversal of 400031233541 is 145332130004.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-400031233541 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 400031233541.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (400031230541) 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, 3390095141 + ... + 3390095258.

It is an arithmetic number, because the mean of its divisors is an integer number (101702856000).

Almost surely, 2^400031233541 is an apocalyptic number.

It is an amenable number.

400031233541 is a deficient number, since it is larger than the sum of its proper divisors (6780190459).

400031233541 is an equidigital number, since it uses as much as digits as its factorization.

400031233541 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6780190458.

The product of its (nonzero) digits is 4320, while the sum is 26.

Adding to 400031233541 its reverse (145332130004), we get a palindrome (545363363545).

The spelling of 400031233541 in words is "four hundred billion, thirty-one million, two hundred thirty-three thousand, five hundred forty-one".