55971611 has 2 divisors, whose sum is σ = 55971612. Its totient is φ = 55971610.

The previous prime is 55971583. The next prime is 55971613. The reversal of 55971611 is 11617955.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 55971611 - 2²² = 51777307 is a prime.

Together with 55971613, 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 (55971613) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27985805 + 27985806.

It is an arithmetic number, because the mean of its divisors is an integer number (27985806).

Almost surely, 2^55971611 is an apocalyptic number.

55971611 is a deficient number, since it is larger than the sum of its proper divisors (1).

55971611 is an equidigital number, since it uses as much as digits as its factorization.

55971611 is an evil number, because the sum of its binary digits is even.

The product of its digits is 9450, while the sum is 35.

The square root of 55971611 is about 7481.4177132413. The cubic root of 55971611 is about 382.5215753846.

The spelling of 55971611 in words is "fifty-five million, nine hundred seventy-one thousand, six hundred eleven".