531640141 has 4 divisors (see below), whose sum is σ = 532091484. Its totient is φ = 531188800.

The previous prime is 531640139. The next prime is 531640199. The reversal of 531640141 is 141046135.

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

It can be written as a sum of positive squares in 2 ways, for example, as 401200900 + 130439241 = 20030^2 + 11421^2 .

It is a cyclic number.

It is not a de Polignac number, because 531640141 - 2¹ = 531640139 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (531640741) 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 3 ways as a sum of consecutive naturals, for example, 223900 + ... + 226261.

It is an arithmetic number, because the mean of its divisors is an integer number (133022871).

Almost surely, 2^531640141 is an apocalyptic number.

It is an amenable number.

531640141 is a deficient number, since it is larger than the sum of its proper divisors (451343).

531640141 is a wasteful number, since it uses less digits than its factorization.

531640141 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 451342.

The product of its (nonzero) digits is 1440, while the sum is 25.

The square root of 531640141 is about 23057.3229365423. The cubic root of 531640141 is about 810.1011614750.

Adding to 531640141 its reverse (141046135), we get a palindrome (672686276).

The spelling of 531640141 in words is "five hundred thirty-one million, six hundred forty thousand, one hundred forty-one".