30551489 has 2 divisors, whose sum is σ = 30551490. Its totient is φ = 30551488.

The previous prime is 30551467. The next prime is 30551491. The reversal of 30551489 is 98415503.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 28569025 + 1982464 = 5345^2 + 1408^2 .

It is a cyclic number.

It is not a de Polignac number, because 30551489 - 2²⁴ = 13774273 is a prime.

It is a super-5 number, since 5×30551489⁵ (a number of 39 digits) contains 55555 as substring.

Together with 30551491, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (30551419) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15275744 + 15275745.

It is an arithmetic number, because the mean of its divisors is an integer number (15275745).

Almost surely, 2^30551489 is an apocalyptic number.

It is an amenable number.

30551489 is a deficient number, since it is larger than the sum of its proper divisors (1).

30551489 is an equidigital number, since it uses as much as digits as its factorization.

30551489 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 21600, while the sum is 35.

The square root of 30551489 is about 5527.3401378963. The cubic root of 30551489 is about 312.6157062733.

The spelling of 30551489 in words is "thirty million, five hundred fifty-one thousand, four hundred eighty-nine".