215220060 has 144 divisors (see below), whose sum is σ = 722423520. Its totient is φ = 51425280.

The previous prime is 215220059. The next prime is 215220091. The reversal of 215220060 is 60022512.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 143796 + ... + 145284.

It is an arithmetic number, because the mean of its divisors is an integer number (5016830).

Almost surely, 2^215220060 is an apocalyptic number.

215220060 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 215220060, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (361211760).

215220060 is an abundant number, since it is smaller than the sum of its proper divisors (507203460).

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

215220060 is a wasteful number, since it uses less digits than its factorization.

215220060 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1588 (or 1583 counting only the distinct ones).

The product of its (nonzero) digits is 240, while the sum is 18.

The square root of 215220060 is about 14670.3803631671. The cubic root of 215220060 is about 599.2769623777.

Adding to 215220060 its reverse (60022512), we get a palindrome (275242572).

The spelling of 215220060 in words is "two hundred fifteen million, two hundred twenty thousand, sixty".