531142251 has 16 divisors (see below), whose sum is σ = 736631808. Its totient is φ = 340048800.

The previous prime is 531142247. The next prime is 531142259. The reversal of 531142251 is 152241135.

It is a happy number.

It is not a de Polignac number, because 531142251 - 2² = 531142247 is a prime.

It is a super-2 number, since 2×531142251² = 564224181594694002, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (531142259) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9616 + ... + 33981.

It is an arithmetic number, because the mean of its divisors is an integer number (46039488).

Almost surely, 2^531142251 is an apocalyptic number.

531142251 is a deficient number, since it is larger than the sum of its proper divisors (205489557).

531142251 is a wasteful number, since it uses less digits than its factorization.

531142251 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43762.

The product of its digits is 1200, while the sum is 24.

The square root of 531142251 is about 23046.5236207112. The cubic root of 531142251 is about 809.8481913337.

Adding to 531142251 its reverse (152241135), we get a palindrome (683383386).

The spelling of 531142251 in words is "five hundred thirty-one million, one hundred forty-two thousand, two hundred fifty-one".