531206995 has 16 divisors (see below), whose sum is σ = 695858688. Its totient is φ = 386076640.

The previous prime is 531206953. The next prime is 531206999. The reversal of 531206995 is 599602135.

It is a happy number.

It is not a de Polignac number, because 531206995 - 2⁷ = 531206867 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (531206999) 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 15 ways as a sum of consecutive naturals, for example, 132612 + ... + 136558.

It is an arithmetic number, because the mean of its divisors is an integer number (43491168).

Almost surely, 2^531206995 is an apocalyptic number.

531206995 is a gapful number since it is divisible by the number (55) formed by its first and last digit.

531206995 is a deficient number, since it is larger than the sum of its proper divisors (164651693).

531206995 is a wasteful number, since it uses less digits than its factorization.

531206995 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6410.

The product of its (nonzero) digits is 72900, while the sum is 40.

The square root of 531206995 is about 23047.9282149177. The cubic root of 531206995 is about 809.8810956896.

The spelling of 531206995 in words is "five hundred thirty-one million, two hundred six thousand, nine hundred ninety-five".