511720055 has 16 divisors (see below), whose sum is σ = 765586944. Its totient is φ = 318994080.

The previous prime is 511720049. The next prime is 511720061. The reversal of 511720055 is 550027115.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (511720049) and next prime (511720061).

It is not a de Polignac number, because 511720055 - 2¹⁴ = 511703671 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 664187 + ... + 664956.

It is an arithmetic number, because the mean of its divisors is an integer number (47849184).

Almost surely, 2^511720055 is an apocalyptic number.

511720055 is a gapful number since it is divisible by the number (55) formed by its first and last digit.

511720055 is a deficient number, since it is larger than the sum of its proper divisors (253866889).

511720055 is a wasteful number, since it uses less digits than its factorization.

511720055 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1329166.

The product of its (nonzero) digits is 1750, while the sum is 26.

The square root of 511720055 is about 22621.2301831709. The cubic root of 511720055 is about 799.8541687307.

The spelling of 511720055 in words is "five hundred eleven million, seven hundred twenty thousand, fifty-five".