215142406 has 8 divisors (see below), whose sum is σ = 329580000. Its totient is φ = 105282408.

The previous prime is 215142401. The next prime is 215142407. The reversal of 215142406 is 604241512.

It is a happy number.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (215142401) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1144281 + ... + 1144468.

It is an arithmetic number, because the mean of its divisors is an integer number (41197500).

Almost surely, 2^215142406 is an apocalyptic number.

215142406 is a deficient number, since it is larger than the sum of its proper divisors (114437594).

215142406 is a wasteful number, since it uses less digits than its factorization.

215142406 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2288798.

The product of its (nonzero) digits is 1920, while the sum is 25.

The square root of 215142406 is about 14667.7334990789. The cubic root of 215142406 is about 599.2048782493.

Adding to 215142406 its reverse (604241512), we get a palindrome (819383918).

The spelling of 215142406 in words is "two hundred fifteen million, one hundred forty-two thousand, four hundred six".