215255838 has 16 divisors (see below), whose sum is σ = 492013440. Its totient is φ = 61501656.

The previous prime is 215255837. The next prime is 215255857. The reversal of 215255838 is 838552512.

215255838 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a junction number, because it is equal to n+sod(n) for n = 215255796 and 215255805.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (215255837) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2562528 + ... + 2562611.

It is an arithmetic number, because the mean of its divisors is an integer number (30750840).

Almost surely, 2^215255838 is an apocalyptic number.

215255838 is an abundant number, since it is smaller than the sum of its proper divisors (276757602).

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

215255838 is a wasteful number, since it uses less digits than its factorization.

215255838 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5125151.

The product of its digits is 96000, while the sum is 39.

The square root of 215255838 is about 14671.5997082799. The cubic root of 215255838 is about 599.3101683021.

The spelling of 215255838 in words is "two hundred fifteen million, two hundred fifty-five thousand, eight hundred thirty-eight".