215451106 has 16 divisors (see below), whose sum is σ = 348929784. Its totient is φ = 99183744.

The previous prime is 215451083. The next prime is 215451107. The reversal of 215451106 is 601154512.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 148620481 + 66830625 = 12191^2 + 8175^2 .

It is not an unprimeable number, because it can be changed into a prime (215451107) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 115 + ... + 20758.

Almost surely, 2^215451106 is an apocalyptic number.

215451106 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

215451106 is a deficient number, since it is larger than the sum of its proper divisors (133478678).

215451106 is a wasteful number, since it uses less digits than its factorization.

215451106 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21285.

The product of its (nonzero) digits is 1200, while the sum is 25.

The square root of 215451106 is about 14678.2528251832. The cubic root of 215451106 is about 599.4913337010.

The spelling of 215451106 in words is "two hundred fifteen million, four hundred fifty-one thousand, one hundred six".