55195691 has 2 divisors, whose sum is σ = 55195692. Its totient is φ = 55195690.

The previous prime is 55195687. The next prime is 55195697. The reversal of 55195691 is 19659155.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 55195691 - 2² = 55195687 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (55195697) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27597845 + 27597846.

It is an arithmetic number, because the mean of its divisors is an integer number (27597846).

Almost surely, 2^55195691 is an apocalyptic number.

55195691 is a deficient number, since it is larger than the sum of its proper divisors (1).

55195691 is an equidigital number, since it uses as much as digits as its factorization.

55195691 is an evil number, because the sum of its binary digits is even.

The product of its digits is 60750, while the sum is 41.

The square root of 55195691 is about 7429.3802567913. The cubic root of 55195691 is about 380.7457446704.

The spelling of 55195691 in words is "fifty-five million, one hundred ninety-five thousand, six hundred ninety-one".