512123540 has 48 divisors (see below), whose sum is σ = 1102368960. Its totient is φ = 199779840.

The previous prime is 512123527. The next prime is 512123569. The reversal of 512123540 is 45321215.

It is a congruent number.

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 15 ways as a sum of consecutive naturals, for example, 152924 + ... + 156236.

It is an arithmetic number, because the mean of its divisors is an integer number (22966020).

Almost surely, 2^512123540 is an apocalyptic number.

It is an amenable number.

512123540 is an abundant number, since it is smaller than the sum of its proper divisors (590245420).

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

512123540 is a wasteful number, since it uses less digits than its factorization.

512123540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3512 (or 3510 counting only the distinct ones).

The product of its (nonzero) digits is 1200, while the sum is 23.

The square root of 512123540 is about 22630.1467074343. The cubic root of 512123540 is about 800.0643385755.

Adding to 512123540 its reverse (45321215), we get a palindrome (557444755).

The spelling of 512123540 in words is "five hundred twelve million, one hundred twenty-three thousand, five hundred forty".