531503971 has 2 divisors, whose sum is σ = 531503972. Its totient is φ = 531503970.

The previous prime is 531503953. The next prime is 531504011. The reversal of 531503971 is 179305135.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 531503971 - 2⁵ = 531503939 is a prime.

It is not a weakly prime, because it can be changed into another prime (531503471) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 265751985 + 265751986.

It is an arithmetic number, because the mean of its divisors is an integer number (265751986).

Almost surely, 2^531503971 is an apocalyptic number.

531503971 is a deficient number, since it is larger than the sum of its proper divisors (1).

531503971 is an equidigital number, since it uses as much as digits as its factorization.

531503971 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 14175, while the sum is 34.

The square root of 531503971 is about 23054.3698894591. The cubic root of 531503971 is about 810.0319913189.

It can be divided in two parts, 53150 and 3971, that added together give a square (57121 = 239²).

The spelling of 531503971 in words is "five hundred thirty-one million, five hundred three thousand, nine hundred seventy-one".