505000061 has 4 divisors (see below), whose sum is σ = 505534272. Its totient is φ = 504465852.

The previous prime is 505000043. The next prime is 505000073. The reversal of 505000061 is 160000505.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 505000061 - 2¹⁸ = 504737917 is a prime.

It is a super-2 number, since 2×505000061² = 510050123220007442, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (505000091) 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, 265685 + ... + 267578.

It is an arithmetic number, because the mean of its divisors is an integer number (126383568).

Almost surely, 2^505000061 is an apocalyptic number.

It is an amenable number.

505000061 is a deficient number, since it is larger than the sum of its proper divisors (534211).

505000061 is an equidigital number, since it uses as much as digits as its factorization.

505000061 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 534210.

The product of its (nonzero) digits is 150, while the sum is 17.

The square root of 505000061 is about 22472.2064114764. The cubic root of 505000061 is about 796.3374562427.

Adding to 505000061 its reverse (160000505), we get a palindrome (665000566).

The spelling of 505000061 in words is "five hundred five million, sixty-one", and thus it is an aban number.