513997501 has 4 divisors (see below), whose sum is σ = 518987872. Its totient is φ = 509007132.

The previous prime is 513997493. The next prime is 513997511. The reversal of 513997501 is 105799315.

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 513997501 - 2³ = 513997493 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 (513997511) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2495031 + ... + 2495236.

It is an arithmetic number, because the mean of its divisors is an integer number (129746968).

Almost surely, 2^513997501 is an apocalyptic number.

It is an amenable number.

513997501 is a deficient number, since it is larger than the sum of its proper divisors (4990371).

513997501 is a wasteful number, since it uses less digits than its factorization.

513997501 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4990370.

The product of its (nonzero) digits is 42525, while the sum is 40.

The square root of 513997501 is about 22671.5129843599. The cubic root of 513997501 is about 801.0390150795.

The spelling of 513997501 in words is "five hundred thirteen million, nine hundred ninety-seven thousand, five hundred one".