505221015031 has 2 divisors, whose sum is σ = 505221015032. Its totient is φ = 505221015030.

The previous prime is 505221015017. The next prime is 505221015037. The reversal of 505221015031 is 130510122505.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 505221015031 - 2¹³ = 505221006839 is a prime.

It is a super-3 number, since 3×505221015031³ (a number of 36 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a junction number, because it is equal to n+sod(n) for n = 505221014987 and 505221015005.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (505221015037) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 252610507515 + 252610507516.

It is an arithmetic number, because the mean of its divisors is an integer number (252610507516).

Almost surely, 2^505221015031 is an apocalyptic number.

505221015031 is a deficient number, since it is larger than the sum of its proper divisors (1).

505221015031 is an equidigital number, since it uses as much as digits as its factorization.

505221015031 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1500, while the sum is 25.

Adding to 505221015031 its reverse (130510122505), we get a palindrome (635731137536).

The spelling of 505221015031 in words is "five hundred five billion, two hundred twenty-one million, fifteen thousand, thirty-one".