215401060 has 36 divisors (see below), whose sum is σ = 526196412. Its totient is φ = 73851456.

The previous prime is 215400979. The next prime is 215401079. The reversal of 215401060 is 60104512.

It can be written as a sum of positive squares in 2 ways, for example, as 22524516 + 192876544 = 4746^2 + 13888^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 108919 + ... + 110878.

It is an arithmetic number, because the mean of its divisors is an integer number (14616567).

Almost surely, 2^215401060 is an apocalyptic number.

215401060 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

215401060 is an abundant number, since it is smaller than the sum of its proper divisors (310795352).

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

215401060 is a wasteful number, since it uses less digits than its factorization.

215401060 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 219820 (or 219811 counting only the distinct ones).

The product of its (nonzero) digits is 240, while the sum is 19.

The square root of 215401060 is about 14676.5479592444. The cubic root of 215401060 is about 599.4449125475. Note that the first 3 decimals are identical.

Adding to 215401060 its reverse (60104512), we get a palindrome (275505572).

The spelling of 215401060 in words is "two hundred fifteen million, four hundred one thousand, sixty".