215147000 has 64 divisors (see below), whose sum is σ = 511842240. Its totient is φ = 84624000.

The previous prime is 215146993. The next prime is 215147003. The reversal of 215147000 is 741512.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (215147003) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 59237 + ... + 62763.

It is an arithmetic number, because the mean of its divisors is an integer number (7997535).

Almost surely, 2^215147000 is an apocalyptic number.

215147000 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 215147000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (255921120).

215147000 is an abundant number, since it is smaller than the sum of its proper divisors (296695240).

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

215147000 is a wasteful number, since it uses less digits than its factorization.

215147000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3609 (or 3595 counting only the distinct ones).

The product of its (nonzero) digits is 280, while the sum is 20.

The square root of 215147000 is about 14667.8901004882. The cubic root of 215147000 is about 599.2091432191.

Adding to 215147000 its reverse (741512), we get a palindrome (215888512).

The spelling of 215147000 in words is "two hundred fifteen million, one hundred forty-seven thousand".