513075478 has 4 divisors (see below), whose sum is σ = 769613220. Its totient is φ = 256537738.

The previous prime is 513075473. The next prime is 513075499. The reversal of 513075478 is 874570315.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 874570315 = 5 ⋅174914063.

It is a super-2 number, since 2×513075478² = 526492892249856968, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 513075478.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (513075473) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 128268868 + ... + 128268871.

It is an arithmetic number, because the mean of its divisors is an integer number (192403305).

Almost surely, 2^513075478 is an apocalyptic number.

513075478 is a deficient number, since it is larger than the sum of its proper divisors (256537742).

513075478 is a wasteful number, since it uses less digits than its factorization.

513075478 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 256537741.

The product of its (nonzero) digits is 117600, while the sum is 40.

The square root of 513075478 is about 22651.1694620830. The cubic root of 513075478 is about 800.5597530460.

It can be divided in two parts, 5130 and 75478, that added together give a palindrome (80608).

The spelling of 513075478 in words is "five hundred thirteen million, seventy-five thousand, four hundred seventy-eight".