513980553 has 4 divisors (see below), whose sum is σ = 685307408. Its totient is φ = 342653700.

The previous prime is 513980507. The next prime is 513980587. The reversal of 513980553 is 355089315.

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.

It is not a de Polignac number, because 513980553 - 2²⁰ = 512931977 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (513980503) 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, 85663423 + ... + 85663428.

It is an arithmetic number, because the mean of its divisors is an integer number (171326852).

Almost surely, 2^513980553 is an apocalyptic number.

It is an amenable number.

513980553 is a deficient number, since it is larger than the sum of its proper divisors (171326855).

513980553 is a wasteful number, since it uses less digits than its factorization.

513980553 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 171326854.

The product of its (nonzero) digits is 81000, while the sum is 39.

The square root of 513980553 is about 22671.1392082533. The cubic root of 513980553 is about 801.0302107835.

The spelling of 513980553 in words is "five hundred thirteen million, nine hundred eighty thousand, five hundred fifty-three".