55023391 has 2 divisors, whose sum is σ = 55023392. Its totient is φ = 55023390.

The previous prime is 55023389. The next prime is 55023401. The reversal of 55023391 is 19332055.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 55023391 - 2¹ = 55023389 is a prime.

Together with 55023389, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (55023191) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27511695 + 27511696.

It is an arithmetic number, because the mean of its divisors is an integer number (27511696).

Almost surely, 2^55023391 is an apocalyptic number.

55023391 is a deficient number, since it is larger than the sum of its proper divisors (1).

55023391 is an equidigital number, since it uses as much as digits as its factorization.

55023391 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4050, while the sum is 28.

The square root of 55023391 is about 7417.7753403564. The cubic root of 55023391 is about 380.3491504722.

The spelling of 55023391 in words is "fifty-five million, twenty-three thousand, three hundred ninety-one".