531231542 has 4 divisors (see below), whose sum is σ = 796847316. Its totient is φ = 265615770.

The previous prime is 531231539. The next prime is 531231557. The reversal of 531231542 is 245132135.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 245132135 = 5 ⋅49026427.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 132807884 + ... + 132807887.

It is an arithmetic number, because the mean of its divisors is an integer number (199211829).

Almost surely, 2^531231542 is an apocalyptic number.

531231542 is a deficient number, since it is larger than the sum of its proper divisors (265615774).

531231542 is a wasteful number, since it uses less digits than its factorization.

531231542 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 265615773.

The product of its digits is 3600, while the sum is 26.

The square root of 531231542 is about 23048.4607295151. The cubic root of 531231542 is about 809.8935703277.

Adding to 531231542 its reverse (245132135), we get a palindrome (776363677).

The spelling of 531231542 in words is "five hundred thirty-one million, two hundred thirty-one thousand, five hundred forty-two".