215552001 has 8 divisors (see below), whose sum is σ = 328460224. Its totient is φ = 123172560.

The previous prime is 215551997. The next prime is 215552003. The reversal of 215552001 is 100255512.

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

It is not a de Polignac number, because 215552001 - 2² = 215551997 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21), and also a Moran number because the ratio is a prime number: 10264381 = 215552001 / (2 + 1 + 5 + 5 + 5 + 2 + 0 + 0 + 1).

It is a Duffinian number.

It is a zygodrome in base 6.

It is not an unprimeable number, because it can be changed into a prime (215552003) 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, 5132170 + ... + 5132211.

It is an arithmetic number, because the mean of its divisors is an integer number (41057528).

Almost surely, 2^215552001 is an apocalyptic number.

215552001 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

215552001 is a deficient number, since it is larger than the sum of its proper divisors (112908223).

215552001 is a wasteful number, since it uses less digits than its factorization.

215552001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10264391.

The product of its (nonzero) digits is 500, while the sum is 21.

The square root of 215552001 is about 14681.6893101577. The cubic root of 215552001 is about 599.5848989959.

The spelling of 215552001 in words is "two hundred fifteen million, five hundred fifty-two thousand, one".