215608040 has 32 divisors (see below), whose sum is σ = 501849000. Its totient is φ = 83268864.

The previous prime is 215608039. The next prime is 215608051. The reversal of 215608040 is 40806512.

It can be written as a sum of positive squares in 4 ways, for example, as 163277284 + 52330756 = 12778^2 + 7234^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 91775 + ... + 94094.

Almost surely, 2^215608040 is an apocalyptic number.

215608040 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

215608040 is an abundant number, since it is smaller than the sum of its proper divisors (286240960).

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

215608040 is a wasteful number, since it uses less digits than its factorization.

215608040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 185909 (or 185905 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 26.

The square root of 215608040 is about 14683.5976518018. The cubic root of 215608040 is about 599.6368543271.

The spelling of 215608040 in words is "two hundred fifteen million, six hundred eight thousand, forty".