30529921 has 8 divisors (see below), whose sum is σ = 31663424. Its totient is φ = 29412720.

The previous prime is 30529907. The next prime is 30529927. The reversal of 30529921 is 12992503.

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

It is a cyclic number.

It is not a de Polignac number, because 30529921 - 2¹¹ = 30527873 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (30529927) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 195 + ... + 7816.

It is an arithmetic number, because the mean of its divisors is an integer number (3957928).

Almost surely, 2^30529921 is an apocalyptic number.

It is an amenable number.

30529921 is a deficient number, since it is larger than the sum of its proper divisors (1133503).

30529921 is a wasteful number, since it uses less digits than its factorization.

30529921 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8151.

The product of its (nonzero) digits is 4860, while the sum is 31.

The square root of 30529921 is about 5525.3887646029. The cubic root of 30529921 is about 312.5421246681.

The spelling of 30529921 in words is "thirty million, five hundred twenty-nine thousand, nine hundred twenty-one".