215460561 has 8 divisors (see below), whose sum is σ = 289001664. Its totient is φ = 142779920.

The previous prime is 215460559. The next prime is 215460563. The reversal of 215460561 is 165064512.

It is an interprime number because it is at equal distance from previous prime (215460559) and next prime (215460563).

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 215460561 - 2¹ = 215460559 is a prime.

It is not an unprimeable number, because it can be changed into a prime (215460563) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 214530 + ... + 215531.

It is an arithmetic number, because the mean of its divisors is an integer number (36125208).

Almost surely, 2^215460561 is an apocalyptic number.

It is an amenable number.

215460561 is a deficient number, since it is larger than the sum of its proper divisors (73541103).

215460561 is a wasteful number, since it uses less digits than its factorization.

215460561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 430231.

The product of its (nonzero) digits is 7200, while the sum is 30.

The square root of 215460561 is about 14678.5748967671. The cubic root of 215460561 is about 599.5001030652.

The spelling of 215460561 in words is "two hundred fifteen million, four hundred sixty thousand, five hundred sixty-one".