1531523142 has 24 divisors (see below), whose sum is σ = 3320114616. Its totient is φ = 510228576.

The previous prime is 1531523141. The next prime is 1531523159. The reversal of 1531523142 is 2413251351.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1531523141) by changing a digit.

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 11 ways as a sum of consecutive naturals, for example, 12018 + ... + 56634.

It is an arithmetic number, because the mean of its divisors is an integer number (138338109).

Almost surely, 2^1531523142 is an apocalyptic number.

1531523142 is an abundant number, since it is smaller than the sum of its proper divisors (1788591474).

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

1531523142 is a wasteful number, since it uses less digits than its factorization.

1531523142 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 46532 (or 46529 counting only the distinct ones).

The product of its digits is 3600, while the sum is 27.

The square root of 1531523142 is about 39134.6795310758. The cubic root of 1531523142 is about 1152.6776024796.

Adding to 1531523142 its reverse (2413251351), we get a palindrome (3944774493).

The spelling of 1531523142 in words is "one billion, five hundred thirty-one million, five hundred twenty-three thousand, one hundred forty-two".