511225505155 has 16 divisors (see below), whose sum is σ = 634646386080. Its totient is φ = 394864178688.

The previous prime is 511225505123. The next prime is 511225505173. The reversal of 511225505155 is 551505522115.

It is a cyclic number.

It is not a de Polignac number, because 511225505155 - 2⁵ = 511225505123 is a prime.

It is a super-2 number, since 2×511225505155² (a number of 24 digits) contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7366699 + ... + 7435771.

It is an arithmetic number, because the mean of its divisors is an integer number (39665399130).

Almost surely, 2^511225505155 is an apocalyptic number.

511225505155 is a deficient number, since it is larger than the sum of its proper divisors (123420880925).

511225505155 is a wasteful number, since it uses less digits than its factorization.

511225505155 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 120150.

The product of its (nonzero) digits is 62500, while the sum is 37.

The spelling of 511225505155 in words is "five hundred eleven billion, two hundred twenty-five million, five hundred five thousand, one hundred fifty-five".