1530079821 has 32 divisors (see below), whose sum is σ = 2304819200. Its totient is φ = 1003045680.

The previous prime is 1530079813. The next prime is 1530079931. The reversal of 1530079821 is 1289700351.

1530079821 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 1530079821 - 2³ = 1530079813 is a prime.

It is a super-2 number, since 2×1530079821² = 4682288517262784082, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1530079321) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 576720 + ... + 579366.

It is an arithmetic number, because the mean of its divisors is an integer number (72025600).

Almost surely, 2^1530079821 is an apocalyptic number.

It is an amenable number.

1530079821 is a deficient number, since it is larger than the sum of its proper divisors (774739379).

1530079821 is a wasteful number, since it uses less digits than its factorization.

1530079821 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3006 (or 3000 counting only the distinct ones).

The product of its (nonzero) digits is 15120, while the sum is 36.

The square root of 1530079821 is about 39116.2347497813. The cubic root of 1530079821 is about 1152.3153908047.

The spelling of 1530079821 in words is "one billion, five hundred thirty million, seventy-nine thousand, eight hundred twenty-one".