505105501 has 2 divisors, whose sum is σ = 505105502. Its totient is φ = 505105500.

The previous prime is 505105493. The next prime is 505105561. The reversal of 505105501 is 105501505.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 410062500 + 95043001 = 20250^2 + 9749^2 .

It is a cyclic number.

It is not a de Polignac number, because 505105501 - 2³ = 505105493 is a prime.

It is a super-2 number, since 2×505105501² = 510263134280922002, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (505105561) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 252552750 + 252552751.

It is an arithmetic number, because the mean of its divisors is an integer number (252552751).

Almost surely, 2^505105501 is an apocalyptic number.

It is an amenable number.

505105501 is a deficient number, since it is larger than the sum of its proper divisors (1).

505105501 is an equidigital number, since it uses as much as digits as its factorization.

505105501 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 625, while the sum is 22.

The square root of 505105501 is about 22474.5522980993. The cubic root of 505105501 is about 796.3928753635.

The spelling of 505105501 in words is "five hundred five million, one hundred five thousand, five hundred one".