215450120 has 32 divisors (see below), whose sum is σ = 510278400. Its totient is φ = 81643968.

The previous prime is 215450111. The next prime is 215450153. The reversal of 215450120 is 21054512.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a junction number, because it is equal to n+sod(n) for n = 215450092 and 215450101.

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 7 ways as a sum of consecutive naturals, for example, 140984 + ... + 142503.

It is an arithmetic number, because the mean of its divisors is an integer number (15946200).

Almost surely, 2^215450120 is an apocalyptic number.

215450120 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

215450120 is an abundant number, since it is smaller than the sum of its proper divisors (294828280).

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

215450120 is a wasteful number, since it uses less digits than its factorization.

215450120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 283517 (or 283513 counting only the distinct ones).

The product of its (nonzero) digits is 400, while the sum is 20.

The square root of 215450120 is about 14678.2192380411. The cubic root of 215450120 is about 599.4904191867.

The spelling of 215450120 in words is "two hundred fifteen million, four hundred fifty thousand, one hundred twenty".