30552421 has 4 divisors (see below), whose sum is σ = 31297644. Its totient is φ = 29807200.

The previous prime is 30552413. The next prime is 30552427. The reversal of 30552421 is 12425503.

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 2515396 + 28037025 = 1586^2 + 5295^2 .

It is a cyclic number.

It is not a de Polignac number, because 30552421 - 2³ = 30552413 is a prime.

It is a super-2 number, since 2×30552421² = 1866900857922482, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 30552392 and 30552401.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30552427) 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, 372550 + ... + 372631.

It is an arithmetic number, because the mean of its divisors is an integer number (7824411).

Almost surely, 2^30552421 is an apocalyptic number.

It is an amenable number.

30552421 is a deficient number, since it is larger than the sum of its proper divisors (745223).

30552421 is an equidigital number, since it uses as much as digits as its factorization.

30552421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 745222.

The product of its (nonzero) digits is 1200, while the sum is 22.

The square root of 30552421 is about 5527.4244454357. The cubic root of 30552421 is about 312.6188851132.

Adding to 30552421 its reverse (12425503), we get a palindrome (42977924).

It can be divided in two parts, 3055 and 2421, that added together give a square (5476 = 74²).

The spelling of 30552421 in words is "thirty million, five hundred fifty-two thousand, four hundred twenty-one".