215402001 has 8 divisors (see below), whose sum is σ = 291248064. Its totient is φ = 141578640.

The previous prime is 215401973. The next prime is 215402003. The reversal of 215402001 is 100204512.

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

It is not a de Polignac number, because 215402001 - 2⁷ = 215401873 is a prime.

It is not an unprimeable number, because it can be changed into a prime (215402003) 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, 505426 + ... + 505851.

It is an arithmetic number, because the mean of its divisors is an integer number (36406008).

Almost surely, 2^215402001 is an apocalyptic number.

It is an amenable number.

215402001 is a deficient number, since it is larger than the sum of its proper divisors (75846063).

215402001 is a wasteful number, since it uses less digits than its factorization.

215402001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1011351.

The product of its (nonzero) digits is 80, while the sum is 15.

The square root of 215402001 is about 14676.5800171566. The cubic root of 215402001 is about 599.4457854569.

Adding to 215402001 its reverse (100204512), we get a palindrome (315606513).

The spelling of 215402001 in words is "two hundred fifteen million, four hundred two thousand, one".