215470451 has 8 divisors (see below), whose sum is σ = 247329120. Its totient is φ = 183881088.

The previous prime is 215470447. The next prime is 215470487. The reversal of 215470451 is 154074512.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 215470451 - 2² = 215470447 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (215470421) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 65606 + ... + 68811.

It is an arithmetic number, because the mean of its divisors is an integer number (30916140).

Almost surely, 2^215470451 is an apocalyptic number.

215470451 is a deficient number, since it is larger than the sum of its proper divisors (31858669).

215470451 is a wasteful number, since it uses less digits than its factorization.

215470451 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 134653.

The product of its (nonzero) digits is 5600, while the sum is 29.

The square root of 215470451 is about 14678.9117784664. The cubic root of 215470451 is about 599.5092756106.

The spelling of 215470451 in words is "two hundred fifteen million, four hundred seventy thousand, four hundred fifty-one".