512531542 has 4 divisors (see below), whose sum is σ = 768797316. Its totient is φ = 256265770.

The previous prime is 512531531. The next prime is 512531543. The reversal of 512531542 is 245135215.

It is a semiprime because it is the product of two primes.

It is a self number, because there is not a number n which added to its sum of digits gives 512531542.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (512531543) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 128132884 + ... + 128132887.

It is an arithmetic number, because the mean of its divisors is an integer number (192199329).

Almost surely, 2^512531542 is an apocalyptic number.

512531542 is a deficient number, since it is larger than the sum of its proper divisors (256265774).

512531542 is a wasteful number, since it uses less digits than its factorization.

512531542 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 256265773.

The product of its digits is 6000, while the sum is 28.

The square root of 512531542 is about 22639.1594808641. The cubic root of 512531542 is about 800.2767490431.

Adding to 512531542 its reverse (245135215), we get a palindrome (757666757).

The spelling of 512531542 in words is "five hundred twelve million, five hundred thirty-one thousand, five hundred forty-two".