513031240 has 32 divisors (see below), whose sum is σ = 1154979000. Its totient is φ = 205095424.

The previous prime is 513031231. The next prime is 513031339. The reversal of 513031240 is 42130315.

It can be written as a sum of positive squares in 4 ways, for example, as 390220516 + 122810724 = 19754^2 + 11082^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 114156 + ... + 118564.

Almost surely, 2^513031240 is an apocalyptic number.

It is an amenable number.

513031240 is an abundant number, since it is smaller than the sum of its proper divisors (641947760).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

513031240 is a wasteful number, since it uses less digits than its factorization.

513031240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7329 (or 7325 counting only the distinct ones).

The product of its (nonzero) digits is 360, while the sum is 19.

The square root of 513031240 is about 22650.1929351606. The cubic root of 513031240 is about 800.5367439685.

Adding to 513031240 its reverse (42130315), we get a palindrome (555161555).

The spelling of 513031240 in words is "five hundred thirteen million, thirty-one thousand, two hundred forty".