30553 has 2 divisors, whose sum is σ = 30554. Its totient is φ = 30552.

The previous prime is 30539. The next prime is 30557. The reversal of 30553 is 35503.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 21904 + 8649 = 148^2 + 93^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-30553 is a prime.

It is not a weakly prime, because it can be changed into another prime (30557) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15276 + 15277.

It is an arithmetic number, because the mean of its divisors is an integer number (15277).

2³⁰⁵⁵³ is an apocalyptic number.

It is an amenable number.

30553 is a deficient number, since it is larger than the sum of its proper divisors (1).

30553 is an equidigital number, since it uses as much as digits as its factorization.

30553 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 225, while the sum is 16.

The square root of 30553 is about 174.7941646623. The cubic root of 30553 is about 31.2620859918.

Subtracting 30553 from its reverse (35503), we obtain a triangular number (4950 = T₉₉).

The spelling of 30553 in words is "thirty thousand, five hundred fifty-three".