55801723 has 2 divisors, whose sum is σ = 55801724. Its totient is φ = 55801722.

The previous prime is 55801721. The next prime is 55801747. The reversal of 55801723 is 32710855.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 55801723 - 2¹ = 55801721 is a prime.

It is a super-2 number, since 2×55801723² = 6227664579537458, which contains 22 as substring.

Together with 55801721, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (55801721) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27900861 + 27900862.

It is an arithmetic number, because the mean of its divisors is an integer number (27900862).

Almost surely, 2^55801723 is an apocalyptic number.

55801723 is a deficient number, since it is larger than the sum of its proper divisors (1).

55801723 is an equidigital number, since it uses as much as digits as its factorization.

55801723 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 8400, while the sum is 31.

The square root of 55801723 is about 7470.0550868116. The cubic root of 55801723 is about 382.1341665726.

The spelling of 55801723 in words is "fifty-five million, eight hundred one thousand, seven hundred twenty-three".