513005501 has 4 divisors (see below), whose sum is σ = 535310112. Its totient is φ = 490700892.

The previous prime is 513005477. The next prime is 513005513. The reversal of 513005501 is 105500315.

It is a happy number.

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, and also an emirpimes, since its reverse is a distinct semiprime: 105500315 = 5 ⋅21100063.

It is a cyclic number.

It is not a de Polignac number, because 513005501 - 2¹⁰ = 513004477 is a prime.

It is a super-2 number, since 2×513005501² = 526349288112522002, 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 (513085501) 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, 11152271 + ... + 11152316.

It is an arithmetic number, because the mean of its divisors is an integer number (133827528).

Almost surely, 2^513005501 is an apocalyptic number.

It is an amenable number.

513005501 is a deficient number, since it is larger than the sum of its proper divisors (22304611).

513005501 is a wasteful number, since it uses less digits than its factorization.

513005501 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22304610.

The product of its (nonzero) digits is 375, while the sum is 20.

The square root of 513005501 is about 22649.6247430283. The cubic root of 513005501 is about 800.5233559860.

Adding to 513005501 its reverse (105500315), we get a palindrome (618505816).

The spelling of 513005501 in words is "five hundred thirteen million, five thousand, five hundred one".