215434900 has 36 divisors (see below), whose sum is σ = 468532512. Its totient is φ = 85982560.

The previous prime is 215434889. The next prime is 215434907. The reversal of 215434900 is 9434512.

215434900 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×215434900² = 92824392276020000, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (215434907) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 48159 + ... + 52441.

It is an arithmetic number, because the mean of its divisors is an integer number (13014792).

Almost surely, 2^215434900 is an apocalyptic number.

215434900 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

215434900 is an abundant number, since it is smaller than the sum of its proper divisors (253097612).

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

215434900 is a wasteful number, since it uses less digits than its factorization.

215434900 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4800 (or 4793 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 28.

The square root of 215434900 is about 14677.7007736225. The cubic root of 215434900 is about 599.4763022934.

The spelling of 215434900 in words is "two hundred fifteen million, four hundred thirty-four thousand, nine hundred".