215474136 has 64 divisors (see below), whose sum is σ = 576720000. Its totient is φ = 66882816.

The previous prime is 215474123. The next prime is 215474183. The reversal of 215474136 is 631474512.

It is a junction number, because it is equal to n+sod(n) for n = 215474097 and 215474106.

It is a congruent number.

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, 22900 + ... + 30908.

It is an arithmetic number, because the mean of its divisors is an integer number (9011250).

Almost surely, 2^215474136 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 215474136, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (288360000).

215474136 is an abundant number, since it is smaller than the sum of its proper divisors (361245864).

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

215474136 is a wasteful number, since it uses less digits than its factorization.

215474136 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8096 (or 8092 counting only the distinct ones).

The product of its digits is 20160, while the sum is 33.

The square root of 215474136 is about 14679.0372981337. The cubic root of 215474136 is about 599.5126932162.

The spelling of 215474136 in words is "two hundred fifteen million, four hundred seventy-four thousand, one hundred thirty-six".