215725147 has 16 divisors (see below), whose sum is σ = 239791968. Its totient is φ = 192430080.

The previous prime is 215725123. The next prime is 215725151. The reversal of 215725147 is 741527512.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-215725147 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (215725117) 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 15 ways as a sum of consecutive naturals, for example, 186523 + ... + 187675.

It is an arithmetic number, because the mean of its divisors is an integer number (14986998).

Almost surely, 2^215725147 is an apocalyptic number.

215725147 is a deficient number, since it is larger than the sum of its proper divisors (24066821).

215725147 is a wasteful number, since it uses less digits than its factorization.

215725147 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1470.

The product of its digits is 19600, while the sum is 34.

The square root of 215725147 is about 14687.5847912446. The cubic root of 215725147 is about 599.7453984602.

The spelling of 215725147 in words is "two hundred fifteen million, seven hundred twenty-five thousand, one hundred forty-seven".