215465991100 has 36 divisors (see below), whose sum is σ = 468521391184. Its totient is φ = 86009402880.

The previous prime is 215465991079. The next prime is 215465991101. The reversal of 215465991100 is 1199564512.

215465991100 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 (215465991101) 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, 2163477 + ... + 2260876.

Almost surely, 2^215465991100 is an apocalyptic number.

215465991100 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

215465991100 is an abundant number, since it is smaller than the sum of its proper divisors (253055400084).

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

215465991100 is a wasteful number, since it uses less digits than its factorization.

215465991100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4424854 (or 4424847 counting only the distinct ones).

The product of its (nonzero) digits is 97200, while the sum is 43.

The spelling of 215465991100 in words is "two hundred fifteen billion, four hundred sixty-five million, nine hundred ninety-one thousand, one hundred".