550215439 has 2 divisors, whose sum is σ = 550215440. Its totient is φ = 550215438.

The previous prime is 550215431. The next prime is 550215451. The reversal of 550215439 is 934512055.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 550215439 - 2³ = 550215431 is a prime.

It is equal to p_28856113 and since 550215439 and 28856113 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (550215431) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 275107719 + 275107720.

It is an arithmetic number, because the mean of its divisors is an integer number (275107720).

Almost surely, 2^550215439 is an apocalyptic number.

550215439 is a deficient number, since it is larger than the sum of its proper divisors (1).

550215439 is an equidigital number, since it uses as much as digits as its factorization.

550215439 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 27000, while the sum is 34.

The square root of 550215439 is about 23456.6715243233. The cubic root of 550215439 is about 819.4282346691.

The spelling of 550215439 in words is "five hundred fifty million, two hundred fifteen thousand, four hundred thirty-nine".