55215301439 has 2 divisors, whose sum is σ = 55215301440. Its totient is φ = 55215301438.

The previous prime is 55215301397. The next prime is 55215301441. The reversal of 55215301439 is 93410351255.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-55215301439 is a prime.

It is a Sophie Germain prime.

Together with 55215301441, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (55215301469) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27607650719 + 27607650720.

It is an arithmetic number, because the mean of its divisors is an integer number (27607650720).

Almost surely, 2^55215301439 is an apocalyptic number.

55215301439 is a deficient number, since it is larger than the sum of its proper divisors (1).

55215301439 is an equidigital number, since it uses as much as digits as its factorization.

55215301439 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 81000, while the sum is 38.

The spelling of 55215301439 in words is "fifty-five billion, two hundred fifteen million, three hundred one thousand, four hundred thirty-nine".