215459121 has 12 divisors (see below), whose sum is σ = 290574992. Its totient is φ = 142009824.

The previous prime is 215459113. The next prime is 215459131. The reversal of 215459121 is 121954512.

It is not a de Polignac number, because 215459121 - 2³ = 215459113 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (215459131) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 19230 + ... + 28296.

Almost surely, 2^215459121 is an apocalyptic number.

It is an amenable number.

215459121 is a deficient number, since it is larger than the sum of its proper divisors (75115871).

215459121 is an frugal number, since it uses more digits than its factorization.

215459121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9248 (or 9159 counting only the distinct ones).

The product of its digits is 3600, while the sum is 30.

The square root of 215459121 is about 14678.5258456018. The cubic root of 215459121 is about 599.4987675044.

The spelling of 215459121 in words is "two hundred fifteen million, four hundred fifty-nine thousand, one hundred twenty-one".