55100489 has 2 divisors, whose sum is σ = 55100490. Its totient is φ = 55100488.

The previous prime is 55100453. The next prime is 55100491. The reversal of 55100489 is 98400155.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 37393225 + 17707264 = 6115^2 + 4208^2 .

It is a cyclic number.

It is not a de Polignac number, because 55100489 - 2⁸ = 55100233 is a prime.

Together with 55100491, 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 (55100429) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27550244 + 27550245.

It is an arithmetic number, because the mean of its divisors is an integer number (27550245).

Almost surely, 2^55100489 is an apocalyptic number.

It is an amenable number.

55100489 is a deficient number, since it is larger than the sum of its proper divisors (1).

55100489 is an equidigital number, since it uses as much as digits as its factorization.

55100489 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 7200, while the sum is 32.

The square root of 55100489 is about 7422.9703623280. The cubic root of 55100489 is about 380.5267141878.

The spelling of 55100489 in words is "fifty-five million, one hundred thousand, four hundred eighty-nine".