505100051501 has 4 divisors (see below), whose sum is σ = 505733803932. Its totient is φ = 504466299072.

The previous prime is 505100051473. The next prime is 505100051527. The reversal of 505100051501 is 105150001505.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 105150001505 = 5 ⋅21030000301.

It can be written as a sum of positive squares in 2 ways, for example, as 90299649001 + 414800402500 = 300499^2 + 644050^2 .

It is a cyclic number.

It is not a de Polignac number, because 505100051501 - 2¹⁸ = 505099789357 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (505100056501) 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, 316875020 + ... + 316876613.

It is an arithmetic number, because the mean of its divisors is an integer number (126433450983).

Almost surely, 2^505100051501 is an apocalyptic number.

It is an amenable number.

505100051501 is a deficient number, since it is larger than the sum of its proper divisors (633752431).

505100051501 is an equidigital number, since it uses as much as digits as its factorization.

505100051501 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 633752430.

The product of its (nonzero) digits is 625, while the sum is 23.

The spelling of 505100051501 in words is "five hundred five billion, one hundred million, fifty-one thousand, five hundred one".