215142004 has 72 divisors (see below), whose sum is σ = 498843072. Its totient is φ = 78858240.

The previous prime is 215142001. The next prime is 215142017. The reversal of 215142004 is 400241512.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (215142001) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 87804 + ... + 90220.

It is an arithmetic number, because the mean of its divisors is an integer number (6928376).

Almost surely, 2^215142004 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 215142004, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (249421536).

215142004 is an abundant number, since it is smaller than the sum of its proper divisors (283701068).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

215142004 is a wasteful number, since it uses less digits than its factorization.

215142004 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2473 (or 2454 counting only the distinct ones).

The product of its (nonzero) digits is 320, while the sum is 19.

The square root of 215142004 is about 14667.7197955238. The cubic root of 215142004 is about 599.2045050383.

Adding to 215142004 its reverse (400241512), we get a palindrome (615383516).

The spelling of 215142004 in words is "two hundred fifteen million, one hundred forty-two thousand, four".