30532531 has 4 divisors (see below), whose sum is σ = 30659464. Its totient is φ = 30405600.

The previous prime is 30532519. The next prime is 30532573. The reversal of 30532531 is 13523503.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 30532531 - 2⁵ = 30532499 is a prime.

It is a super-2 number, since 2×30532531² = 1864470898531922, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (30532501) 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, 63105 + ... + 63586.

It is an arithmetic number, because the mean of its divisors is an integer number (7664866).

Almost surely, 2^30532531 is an apocalyptic number.

30532531 is a deficient number, since it is larger than the sum of its proper divisors (126933).

30532531 is a wasteful number, since it uses less digits than its factorization.

30532531 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 126932.

The product of its (nonzero) digits is 1350, while the sum is 22.

The square root of 30532531 is about 5525.6249420314. The cubic root of 30532531 is about 312.5510308130.

Subtracting from 30532531 its reverse (13523503), we obtain a triangular number (17009028 = T₅₈₃₂).

The spelling of 30532531 in words is "thirty million, five hundred thirty-two thousand, five hundred thirty-one".