505515253243 has 128 divisors (see below), whose sum is σ = 721031528448. Its totient is φ = 341712000000.

The previous prime is 505515253241. The next prime is 505515253261. The reversal of 505515253243 is 342352515505.

It is not a de Polignac number, because 505515253243 - 2¹ = 505515253241 is a prime.

It is a super-2 number, since 2×505515253243² (a number of 24 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 505515253196 and 505515253205.

It is not an unprimeable number, because it can be changed into a prime (505515253241) by changing a digit.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 319339230 + ... + 319340812.

It is an arithmetic number, because the mean of its divisors is an integer number (5633058816).

Almost surely, 2^505515253243 is an apocalyptic number.

505515253243 is a deficient number, since it is larger than the sum of its proper divisors (215516275205).

505515253243 is a wasteful number, since it uses less digits than its factorization.

505515253243 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1937.

The product of its (nonzero) digits is 450000, while the sum is 40.

Adding to 505515253243 its reverse (342352515505), we get a palindrome (847867768748).

The spelling of 505515253243 in words is "five hundred five billion, five hundred fifteen million, two hundred fifty-three thousand, two hundred forty-three".