55501427 has 2 divisors, whose sum is σ = 55501428. Its totient is φ = 55501426.

The previous prime is 55501423. The next prime is 55501429. The reversal of 55501427 is 72410555.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 55501427 - 2² = 55501423 is a prime.

Together with 55501429, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 55501427.

It is not a weakly prime, because it can be changed into another prime (55501421) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27750713 + 27750714.

It is an arithmetic number, because the mean of its divisors is an integer number (27750714).

Almost surely, 2^55501427 is an apocalyptic number.

55501427 is a deficient number, since it is larger than the sum of its proper divisors (1).

55501427 is an equidigital number, since it uses as much as digits as its factorization.

55501427 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 7000, while the sum is 29.

The square root of 55501427 is about 7449.9279862291. The cubic root of 55501427 is about 381.4474504589.

The spelling of 55501427 in words is "fifty-five million, five hundred one thousand, four hundred twenty-seven".