55303691 has 2 divisors, whose sum is σ = 55303692. Its totient is φ = 55303690.

The previous prime is 55303681. The next prime is 55303693. The reversal of 55303691 is 19630355.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 55303691 - 2⁶ = 55303627 is a prime.

Together with 55303693, 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 (55303693) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27651845 + 27651846.

It is an arithmetic number, because the mean of its divisors is an integer number (27651846).

Almost surely, 2^55303691 is an apocalyptic number.

55303691 is a deficient number, since it is larger than the sum of its proper divisors (1).

55303691 is an equidigital number, since it uses as much as digits as its factorization.

55303691 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 12150, while the sum is 32.

The square root of 55303691 is about 7436.6451441493. The cubic root of 55303691 is about 380.9939147055.

The spelling of 55303691 in words is "fifty-five million, three hundred three thousand, six hundred ninety-one".