215415201 has 8 divisors (see below), whose sum is σ = 287311104. Its totient is φ = 143564720.

The previous prime is 215415191. The next prime is 215415203. The reversal of 215415201 is 102514512.

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 215415201 - 2⁵ = 215415169 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (215415203) 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, 1936 + ... + 20846.

It is an arithmetic number, because the mean of its divisors is an integer number (35913888).

Almost surely, 2^215415201 is an apocalyptic number.

It is an amenable number.

215415201 is a deficient number, since it is larger than the sum of its proper divisors (71895903).

215415201 is a wasteful number, since it uses less digits than its factorization.

215415201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22711.

The product of its (nonzero) digits is 400, while the sum is 21.

The square root of 215415201 is about 14677.0297063132. The cubic root of 215415201 is about 599.4580300394.

Adding to 215415201 its reverse (102514512), we get a palindrome (317929713).

It can be divided in two parts, 215 and 415201, that added together give a triangular number (415416 = T₉₁₁).

The spelling of 215415201 in words is "two hundred fifteen million, four hundred fifteen thousand, two hundred one".