215147020 has 48 divisors (see below), whose sum is σ = 499161600. Its totient is φ = 77238720.

The previous prime is 215147003. The next prime is 215147041. The reversal of 215147020 is 20741512.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (22).

It is a junction number, because it is equal to n+sod(n) for n = 215146982 and 215147000.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 11191 + ... + 23569.

It is an arithmetic number, because the mean of its divisors is an integer number (10399200).

Almost surely, 2^215147020 is an apocalyptic number.

215147020 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 215147020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (249580800).

215147020 is an abundant number, since it is smaller than the sum of its proper divisors (284014580).

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

215147020 is a wasteful number, since it uses less digits than its factorization.

215147020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12478 (or 12476 counting only the distinct ones).

The product of its (nonzero) digits is 560, while the sum is 22.

The square root of 215147020 is about 14667.8907822495. The cubic root of 215147020 is about 599.2091617865.

Adding to 215147020 its reverse (20741512), we get a palindrome (235888532).

The spelling of 215147020 in words is "two hundred fifteen million, one hundred forty-seven thousand, twenty".