505651501 has 2 divisors, whose sum is σ = 505651502. Its totient is φ = 505651500.

The previous prime is 505651477. The next prime is 505651507. The reversal of 505651501 is 105156505.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 460102500 + 45549001 = 21450^2 + 6749^2 .

It is a cyclic number.

It is not a de Polignac number, because 505651501 - 2⁵ = 505651469 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 505651501.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (505651507) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 252825750 + 252825751.

It is an arithmetic number, because the mean of its divisors is an integer number (252825751).

Almost surely, 2^505651501 is an apocalyptic number.

It is an amenable number.

505651501 is a deficient number, since it is larger than the sum of its proper divisors (1).

505651501 is an equidigital number, since it uses as much as digits as its factorization.

505651501 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3750, while the sum is 28.

The square root of 505651501 is about 22486.6960890212. The cubic root of 505651501 is about 796.6797289183.

The spelling of 505651501 in words is "five hundred five million, six hundred fifty-one thousand, five hundred one".