215144045 has 16 divisors (see below), whose sum is σ = 261211392. Its totient is φ = 170102400.

The previous prime is 215144029. The next prime is 215144063. The reversal of 215144045 is 540441512.

It is not a de Polignac number, because 215144045 - 2⁴ = 215144029 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 175304 + ... + 176526.

It is an arithmetic number, because the mean of its divisors is an integer number (16325712).

Almost surely, 2^215144045 is an apocalyptic number.

It is an amenable number.

215144045 is a deficient number, since it is larger than the sum of its proper divisors (46067347).

215144045 is a wasteful number, since it uses less digits than its factorization.

215144045 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1612.

The product of its (nonzero) digits is 3200, while the sum is 26.

The square root of 215144045 is about 14667.7893699085. The cubic root of 215144045 is about 599.2063998682.

Adding to 215144045 its reverse (540441512), we get a palindrome (755585557).

The spelling of 215144045 in words is "two hundred fifteen million, one hundred forty-four thousand, forty-five".