501315131431 has 4 divisors (see below), whose sum is σ = 501317129200. Its totient is φ = 501313133664.

The previous prime is 501315131411. The next prime is 501315131483. The reversal of 501315131431 is 134131513105.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 501315131431 - 2¹⁵ = 501315098663 is a prime.

It is a super-2 number, since 2×501315131431² (a number of 24 digits) contains 22 as substring.

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 501315131431.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (501315131411) 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, 557451 + ... + 1146028.

It is an arithmetic number, because the mean of its divisors is an integer number (125329282300).

Almost surely, 2^501315131431 is an apocalyptic number.

501315131431 is a deficient number, since it is larger than the sum of its proper divisors (1997769).

501315131431 is a wasteful number, since it uses less digits than its factorization.

501315131431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1997768.

The product of its (nonzero) digits is 2700, while the sum is 28.

Adding to 501315131431 its reverse (134131513105), we get a palindrome (635446644536).

The spelling of 501315131431 in words is "five hundred one billion, three hundred fifteen million, one hundred thirty-one thousand, four hundred thirty-one".