151812211518 has 24 divisors (see below), whose sum is σ = 358828864056. Its totient is φ = 46003700400.

The previous prime is 151812211517. The next prime is 151812211531. The reversal of 151812211518 is 815112218151.

It is a happy number.

151812211518 is a `hidden beast` number, since 1 + 5 + 1 + 8 + 122 + 11 + 518 = 666.

151812211518 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (151812211517) by changing a digit.

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 11 ways as a sum of consecutive naturals, for example, 383363973 + ... + 383364368.

It is an arithmetic number, because the mean of its divisors is an integer number (14951202669).

Almost surely, 2^151812211518 is an apocalyptic number.

151812211518 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

151812211518 is an abundant number, since it is smaller than the sum of its proper divisors (207016652538).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

151812211518 is a wasteful number, since it uses less digits than its factorization.

151812211518 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 766728360 (or 766728357 counting only the distinct ones).

The product of its digits is 6400, while the sum is 36.

Adding to 151812211518 its reverse (815112218151), we get a palindrome (966924429669).

The spelling of 151812211518 in words is "one hundred fifty-one billion, eight hundred twelve million, two hundred eleven thousand, five hundred eighteen".