215054661 has 8 divisors (see below), whose sum is σ = 286847104. Its totient is φ = 143316000.

The previous prime is 215054659. The next prime is 215054681. The reversal of 215054661 is 166450512.

215054661 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is not a de Polignac number, because 215054661 - 2¹ = 215054659 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (215054621) 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, 2941 + ... + 20946.

It is an arithmetic number, because the mean of its divisors is an integer number (35855888).

Almost surely, 2^215054661 is an apocalyptic number.

It is an amenable number.

215054661 is a deficient number, since it is larger than the sum of its proper divisors (71792443).

215054661 is a wasteful number, since it uses less digits than its factorization.

215054661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26891.

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

The square root of 215054661 is about 14664.7421047900. The cubic root of 215054661 is about 599.1234060399.

The spelling of 215054661 in words is "two hundred fifteen million, fifty-four thousand, six hundred sixty-one".