215525141 has 4 divisors (see below), whose sum is σ = 232104012. Its totient is φ = 198946272.

The previous prime is 215525137. The next prime is 215525143. The reversal of 215525141 is 141525512.

215525141 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 63520900 + 152004241 = 7970^2 + 12329^2 .

It is a cyclic number.

It is not a de Polignac number, because 215525141 - 2² = 215525137 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 215525141.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (215525143) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8289416 + ... + 8289441.

It is an arithmetic number, because the mean of its divisors is an integer number (58026003).

Almost surely, 2^215525141 is an apocalyptic number.

It is an amenable number.

215525141 is a deficient number, since it is larger than the sum of its proper divisors (16578871).

215525141 is a wasteful number, since it uses less digits than its factorization.

215525141 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16578870.

The product of its digits is 2000, while the sum is 26.

The square root of 215525141 is about 14680.7745367879. The cubic root of 215525141 is about 599.5599931429.

The spelling of 215525141 in words is "two hundred fifteen million, five hundred twenty-five thousand, one hundred forty-one".