513105550 has 24 divisors (see below), whose sum is σ = 960710832. Its totient is φ = 203880000.

The previous prime is 513105547. The next prime is 513105563. The reversal of 513105550 is 55501315.

It is a Harshad number since it is a multiple of its sum of digits (25).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 26431 + ... + 41530.

It is an arithmetic number, because the mean of its divisors is an integer number (40029618).

Almost surely, 2^513105550 is an apocalyptic number.

513105550 is a gapful number since it is divisible by the number (50) formed by its first and last digit.

513105550 is a deficient number, since it is larger than the sum of its proper divisors (447605282).

513105550 is a wasteful number, since it uses less digits than its factorization.

513105550 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 68124 (or 68119 counting only the distinct ones).

The product of its (nonzero) digits is 1875, while the sum is 25.

The square root of 513105550 is about 22651.8332591426. The cubic root of 513105550 is about 800.5753933456.

Adding to 513105550 its reverse (55501315), we get a palindrome (568606865).

The spelling of 513105550 in words is "five hundred thirteen million, one hundred five thousand, five hundred fifty".