505212345 has 24 divisors (see below), whose sum is σ = 955311552. Its totient is φ = 244951200.

The previous prime is 505212343. The next prime is 505212391. The reversal of 505212345 is 543212505.

It is a happy number.

It is not a de Polignac number, because 505212345 - 2¹ = 505212343 is a prime.

It is an alternating number because its digits alternate between odd and even.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (505212343) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 509821 + ... + 510810.

It is an arithmetic number, because the mean of its divisors is an integer number (39804648).

Almost surely, 2^505212345 is an apocalyptic number.

505212345 is a gapful number since it is divisible by the number (55) formed by its first and last digit.

It is an amenable number.

505212345 is a deficient number, since it is larger than the sum of its proper divisors (450099207).

505212345 is a wasteful number, since it uses less digits than its factorization.

505212345 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1020653 (or 1020650 counting only the distinct ones).

The product of its (nonzero) digits is 6000, while the sum is 27.

The square root of 505212345 is about 22476.9291719309. The cubic root of 505212345 is about 796.4490245583.

The spelling of 505212345 in words is "five hundred five million, two hundred twelve thousand, three hundred forty-five".