215254120 has 16 divisors (see below), whose sum is σ = 484321860. Its totient is φ = 86101632.

The previous prime is 215254099. The next prime is 215254133. The reversal of 215254120 is 21452512.

It can be written as a sum of positive squares in 2 ways, for example, as 212751396 + 2502724 = 14586^2 + 1582^2 .

It is a junction number, because it is equal to n+sod(n) for n = 215254091 and 215254100.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2690637 + ... + 2690716.

Almost surely, 2^215254120 is an apocalyptic number.

215254120 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

215254120 is an abundant number, since it is smaller than the sum of its proper divisors (269067740).

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

215254120 is a wasteful number, since it uses less digits than its factorization.

215254120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5381364 (or 5381360 counting only the distinct ones).

The product of its (nonzero) digits is 800, while the sum is 22.

The square root of 215254120 is about 14671.5411596737. The cubic root of 215254120 is about 599.3085738930.

The spelling of 215254120 in words is "two hundred fifteen million, two hundred fifty-four thousand, one hundred twenty".