215662045 has 16 divisors (see below), whose sum is σ = 261197568. Its totient is φ = 170936640.

The previous prime is 215662037. The next prime is 215662063. The reversal of 215662045 is 540266512.

It is not a de Polignac number, because 215662045 - 2³ = 215662037 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 215661998 and 215662016.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 386907 + ... + 387463.

It is an arithmetic number, because the mean of its divisors is an integer number (16324848).

Almost surely, 2^215662045 is an apocalyptic number.

It is an amenable number.

215662045 is a deficient number, since it is larger than the sum of its proper divisors (45535523).

215662045 is a wasteful number, since it uses less digits than its factorization.

215662045 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1140.

The product of its (nonzero) digits is 14400, while the sum is 31.

The square root of 215662045 is about 14685.4364933426. The cubic root of 215662045 is about 599.6869153621.

The spelling of 215662045 in words is "two hundred fifteen million, six hundred sixty-two thousand, forty-five".