215148880 has 20 divisors (see below), whose sum is σ = 500221332. Its totient is φ = 86059520.

The previous prime is 215148863. The next prime is 215148881. The reversal of 215148880 is 88841512.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 23270976 + 191877904 = 4824^2 + 13852^2 .

It is a tau number, because it is divible by the number of its divisors (20).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (215148881) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1344601 + ... + 1344760.

Almost surely, 2^215148880 is an apocalyptic number.

215148880 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

215148880 is an abundant number, since it is smaller than the sum of its proper divisors (285072452).

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

215148880 is a wasteful number, since it uses less digits than its factorization.

215148880 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2689374 (or 2689368 counting only the distinct ones).

The product of its (nonzero) digits is 20480, while the sum is 37.

The square root of 215148880 is about 14667.9541859115. The cubic root of 215148880 is about 599.2108885528.

The spelling of 215148880 in words is "two hundred fifteen million, one hundred forty-eight thousand, eight hundred eighty".