531631541 has 4 divisors (see below), whose sum is σ = 607578912. Its totient is φ = 455684172.

The previous prime is 531631537. The next prime is 531631547. The reversal of 531631541 is 145136135.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 145136135 = 5 ⋅29027227.

It is a cyclic number.

It is not a de Polignac number, because 531631541 - 2² = 531631537 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 (531631547) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 37973675 + ... + 37973688.

It is an arithmetic number, because the mean of its divisors is an integer number (151894728).

Almost surely, 2^531631541 is an apocalyptic number.

It is an amenable number.

531631541 is a deficient number, since it is larger than the sum of its proper divisors (75947371).

531631541 is an equidigital number, since it uses as much as digits as its factorization.

531631541 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 75947370.

The product of its digits is 5400, while the sum is 29.

The square root of 531631541 is about 23057.1364440600. The cubic root of 531631541 is about 810.0967932899.

Adding to 531631541 its reverse (145136135), we get a palindrome (676767676).

The spelling of 531631541 in words is "five hundred thirty-one million, six hundred thirty-one thousand, five hundred forty-one".