505212161523 has 4 divisors (see below), whose sum is σ = 673616215368. Its totient is φ = 336808107680.

The previous prime is 505212161521. The next prime is 505212161533. The reversal of 505212161523 is 325161212505.

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 505212161523 - 2¹ = 505212161521 is a prime.

It is not an unprimeable number, because it can be changed into a prime (505212161521) 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, 84202026918 + ... + 84202026923.

It is an arithmetic number, because the mean of its divisors is an integer number (168404053842).

Almost surely, 2^505212161523 is an apocalyptic number.

505212161523 is a deficient number, since it is larger than the sum of its proper divisors (168404053845).

505212161523 is a wasteful number, since it uses less digits than its factorization.

505212161523 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 168404053844.

The product of its (nonzero) digits is 18000, while the sum is 33.

The spelling of 505212161523 in words is "five hundred five billion, two hundred twelve million, one hundred sixty-one thousand, five hundred twenty-three".