531650021 has 8 divisors (see below), whose sum is σ = 615923904. Its totient is φ = 449457120.

The previous prime is 531650017. The next prime is 531650023. The reversal of 531650021 is 120056135.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 531650021 - 2² = 531650017 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 (531650023) 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 7 ways as a sum of consecutive naturals, for example, 519695 + ... + 520716.

It is an arithmetic number, because the mean of its divisors is an integer number (76990488).

Almost surely, 2^531650021 is an apocalyptic number.

It is an amenable number.

531650021 is a deficient number, since it is larger than the sum of its proper divisors (84273883).

531650021 is a wasteful number, since it uses less digits than its factorization.

531650021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1040491.

The product of its (nonzero) digits is 900, while the sum is 23.

The square root of 531650021 is about 23057.5371841834. The cubic root of 531650021 is about 810.1061797504.

The spelling of 531650021 in words is "five hundred thirty-one million, six hundred fifty thousand, twenty-one".