215490741 has 8 divisors (see below), whose sum is σ = 289224384. Its totient is φ = 142708800.

The previous prime is 215490721. The next prime is 215490787. The reversal of 215490741 is 147094512.

It is a happy number.

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

It is not a de Polignac number, because 215490741 - 2¹⁰ = 215489717 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (215490721) 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, 237396 + ... + 238301.

It is an arithmetic number, because the mean of its divisors is an integer number (36153048).

Almost surely, 2^215490741 is an apocalyptic number.

It is an amenable number.

215490741 is a deficient number, since it is larger than the sum of its proper divisors (73733643).

215490741 is a wasteful number, since it uses less digits than its factorization.

215490741 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 475851.

The product of its (nonzero) digits is 10080, while the sum is 33.

The square root of 215490741 is about 14679.6028897242. The cubic root of 215490741 is about 599.5280928256.

The spelling of 215490741 in words is "two hundred fifteen million, four hundred ninety thousand, seven hundred forty-one".