501400412531 has 2 divisors, whose sum is σ = 501400412532. Its totient is φ = 501400412530.

The previous prime is 501400412519. The next prime is 501400412647. The reversal of 501400412531 is 135214004105.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 501400412531 - 2²² = 501396218227 is a prime.

It is a super-2 number, since 2×501400412531² (a number of 24 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 501400412531.

It is not a weakly prime, because it can be changed into another prime (501400412731) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 250700206265 + 250700206266.

It is an arithmetic number, because the mean of its divisors is an integer number (250700206266).

Almost surely, 2^501400412531 is an apocalyptic number.

501400412531 is a deficient number, since it is larger than the sum of its proper divisors (1).

501400412531 is an equidigital number, since it uses as much as digits as its factorization.

501400412531 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2400, while the sum is 26.

Adding to 501400412531 its reverse (135214004105), we get a palindrome (636614416636).

The spelling of 501400412531 in words is "five hundred one billion, four hundred million, four hundred twelve thousand, five hundred thirty-one".