30531229 has 4 divisors (see below), whose sum is σ = 31584060. Its totient is φ = 29478400.

The previous prime is 30531223. The next prime is 30531239. The reversal of 30531229 is 92213503.

It is a happy number.

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

It can be written as a sum of positive squares in 2 ways, for example, as 24900100 + 5631129 = 4990^2 + 2373^2 .

It is a cyclic number.

It is not a de Polignac number, because 30531229 - 2⁵ = 30531197 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 (30531223) 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, 526372 + ... + 526429.

It is an arithmetic number, because the mean of its divisors is an integer number (7896015).

Almost surely, 2^30531229 is an apocalyptic number.

It is an amenable number.

30531229 is a deficient number, since it is larger than the sum of its proper divisors (1052831).

30531229 is a wasteful number, since it uses less digits than its factorization.

30531229 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1052830.

The product of its (nonzero) digits is 1620, while the sum is 25.

The square root of 30531229 is about 5525.5071260473. The cubic root of 30531229 is about 312.5465880409.

The spelling of 30531229 in words is "thirty million, five hundred thirty-one thousand, two hundred twenty-nine".