215525465 has 8 divisors (see below), whose sum is σ = 260920008. Its totient is φ = 170894080.

The previous prime is 215525449. The next prime is 215525467. The reversal of 215525465 is 564525512.

It can be written as a sum of positive squares in 4 ways, for example, as 1517824 + 214007641 = 1232^2 + 14629^2 .

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

It is not a de Polignac number, because 215525465 - 2⁴ = 215525449 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (215525467) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 190166 + ... + 191295.

It is an arithmetic number, because the mean of its divisors is an integer number (32615001).

Almost surely, 2^215525465 is an apocalyptic number.

It is an amenable number.

215525465 is a deficient number, since it is larger than the sum of its proper divisors (45394543).

215525465 is a wasteful number, since it uses less digits than its factorization.

215525465 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 381579.

The product of its digits is 60000, while the sum is 35.

The square root of 215525465 is about 14680.7855716239. The cubic root of 215525465 is about 599.5602935832.

The spelling of 215525465 in words is "two hundred fifteen million, five hundred twenty-five thousand, four hundred sixty-five".