531507641 has 16 divisors (see below), whose sum is σ = 623618688. Its totient is φ = 443491200.

The previous prime is 531507637. The next prime is 531507659. The reversal of 531507641 is 146705135.

It is a cyclic number.

It is not a de Polignac number, because 531507641 - 2² = 531507637 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 531507598 and 531507607.

It is not an unprimeable number, because it can be changed into a prime (531507241) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 148331 + ... + 151871.

It is an arithmetic number, because the mean of its divisors is an integer number (38976168).

Almost surely, 2^531507641 is an apocalyptic number.

It is an amenable number.

531507641 is a deficient number, since it is larger than the sum of its proper divisors (92111047).

531507641 is a wasteful number, since it uses less digits than its factorization.

531507641 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4112.

The product of its (nonzero) digits is 12600, while the sum is 32.

The square root of 531507641 is about 23054.4494837764. The cubic root of 531507641 is about 810.0338557205.

The spelling of 531507641 in words is "five hundred thirty-one million, five hundred seven thousand, six hundred forty-one".