55209607 has 2 divisors, whose sum is σ = 55209608. Its totient is φ = 55209606.

The previous prime is 55209593. The next prime is 55209619. The reversal of 55209607 is 70690255.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-55209607 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (55209907) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27604803 + 27604804.

It is an arithmetic number, because the mean of its divisors is an integer number (27604804).

Almost surely, 2^55209607 is an apocalyptic number.

55209607 is a deficient number, since it is larger than the sum of its proper divisors (1).

55209607 is an equidigital number, since it uses as much as digits as its factorization.

55209607 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 18900, while the sum is 34.

The square root of 55209607 is about 7430.3167496413. The cubic root of 55209607 is about 380.7777399975. Note that the first 4 decimals are identical.

The spelling of 55209607 in words is "fifty-five million, two hundred nine thousand, six hundred seven".