215041551 has 8 divisors (see below), whose sum is σ = 303588144. Its totient is φ = 134928000.

The previous prime is 215041543. The next prime is 215041571. The reversal of 215041551 is 155140512.

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

It is not a de Polignac number, because 215041551 - 2³ = 215041543 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (215041571) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2108200 + ... + 2108301.

It is an arithmetic number, because the mean of its divisors is an integer number (37948518).

Almost surely, 2^215041551 is an apocalyptic number.

215041551 is a deficient number, since it is larger than the sum of its proper divisors (88546593).

215041551 is a wasteful number, since it uses less digits than its factorization.

215041551 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4216521.

The product of its (nonzero) digits is 1000, while the sum is 24.

The square root of 215041551 is about 14664.2951075052. The cubic root of 215041551 is about 599.1112313561. Note that the first 3 decimals are identical.

The spelling of 215041551 in words is "two hundred fifteen million, forty-one thousand, five hundred fifty-one".