400311852541 has 2 divisors, whose sum is σ = 400311852542. Its totient is φ = 400311852540.

The previous prime is 400311852539. The next prime is 400311852547. The reversal of 400311852541 is 145258113004.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 356852111641 + 43459740900 = 597371^2 + 208470^2 .

It is a cyclic number.

It is not a de Polignac number, because 400311852541 - 2¹ = 400311852539 is a prime.

Together with 400311852539, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 400311852497 and 400311852506.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (400311852547) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 200155926270 + 200155926271.

It is an arithmetic number, because the mean of its divisors is an integer number (200155926271).

Almost surely, 2^400311852541 is an apocalyptic number.

It is an amenable number.

400311852541 is a deficient number, since it is larger than the sum of its proper divisors (1).

400311852541 is an equidigital number, since it uses as much as digits as its factorization.

400311852541 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 19200, while the sum is 34.

Adding to 400311852541 its reverse (145258113004), we get a palindrome (545569965545).

The spelling of 400311852541 in words is "four hundred billion, three hundred eleven million, eight hundred fifty-two thousand, five hundred forty-one".