215753145 has 32 divisors (see below), whose sum is σ = 355525632. Its totient is φ = 111663552.

The previous prime is 215753143. The next prime is 215753191. The reversal of 215753145 is 541357512.

215753145 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 215753145 - 2¹ = 215753143 is a prime.

It is not an unprimeable number, because it can be changed into a prime (215753141) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 106714 + ... + 108716.

It is an arithmetic number, because the mean of its divisors is an integer number (11110176).

Almost surely, 2^215753145 is an apocalyptic number.

It is an amenable number.

215753145 is a deficient number, since it is larger than the sum of its proper divisors (139772487).

215753145 is a wasteful number, since it uses less digits than its factorization.

215753145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2221.

The product of its digits is 21000, while the sum is 33.

The square root of 215753145 is about 14688.5378782233. The cubic root of 215753145 is about 599.7713434269.

The spelling of 215753145 in words is "two hundred fifteen million, seven hundred fifty-three thousand, one hundred forty-five".