531348491 has 4 divisors (see below), whose sum is σ = 540059184. Its totient is φ = 522637800.

The previous prime is 531348449. The next prime is 531348497. The reversal of 531348491 is 194843135.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 194843135 = 5 ⋅38968627.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-531348491 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (531348497) 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, 4355255 + ... + 4355376.

It is an arithmetic number, because the mean of its divisors is an integer number (135014796).

Almost surely, 2^531348491 is an apocalyptic number.

531348491 is a deficient number, since it is larger than the sum of its proper divisors (8710693).

531348491 is an equidigital number, since it uses as much as digits as its factorization.

531348491 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8710692.

The product of its digits is 51840, while the sum is 38.

The square root of 531348491 is about 23050.9976139863. The cubic root of 531348491 is about 809.9529978315.

The spelling of 531348491 in words is "five hundred thirty-one million, three hundred forty-eight thousand, four hundred ninety-one".