215430061 has 8 divisors (see below), whose sum is σ = 268588224. Its totient is φ = 167867520.

The previous prime is 215430053. The next prime is 215430073. The reversal of 215430061 is 160034512.

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 215430061 - 2³ = 215430053 is a prime.

It is a super-2 number, since 2×215430061² = 92820222364927442, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (215430161) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1398820 + ... + 1398973.

It is an arithmetic number, because the mean of its divisors is an integer number (33573528).

Almost surely, 2^215430061 is an apocalyptic number.

It is an amenable number.

215430061 is a deficient number, since it is larger than the sum of its proper divisors (53158163).

215430061 is a wasteful number, since it uses less digits than its factorization.

215430061 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2797811.

The product of its (nonzero) digits is 720, while the sum is 22.

The square root of 215430061 is about 14677.5359308026. The cubic root of 215430061 is about 599.4718138725.

Adding to 215430061 its reverse (160034512), we get a palindrome (375464573).

The spelling of 215430061 in words is "two hundred fifteen million, four hundred thirty thousand, sixty-one".