30530531 has 4 divisors (see below), whose sum is σ = 30547272. Its totient is φ = 30513792.

The previous prime is 30530519. The next prime is 30530543. The reversal of 30530531 is 13503503.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 13503503 = 13 ⋅1038731.

It is an interprime number because it is at equal distance from previous prime (30530519) and next prime (30530543).

It is a cyclic number.

It is not a de Polignac number, because 30530531 - 2¹⁰ = 30529507 is a prime.

It is a super-2 number, since 2×30530531² = 1864226646283922, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (30530501) 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, 5246 + ... + 9411.

It is an arithmetic number, because the mean of its divisors is an integer number (7636818).

Almost surely, 2^30530531 is an apocalyptic number.

30530531 is a deficient number, since it is larger than the sum of its proper divisors (16741).

30530531 is a wasteful number, since it uses less digits than its factorization.

30530531 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16740.

The product of its (nonzero) digits is 675, while the sum is 20.

The square root of 30530531 is about 5525.4439640630. The cubic root of 30530531 is about 312.5442062263.

The spelling of 30530531 in words is "thirty million, five hundred thirty thousand, five hundred thirty-one".