215066042451 has 12 divisors (see below), whose sum is σ = 334547177328. Its totient is φ = 132348333744.

The previous prime is 215066042449. The next prime is 215066042459. The reversal of 215066042451 is 154240660512.

215066042451 is a `hidden beast` number, since 2 + 1 + 5 + 0 + 6 + 604 + 2 + 45 + 1 = 666.

It is not a de Polignac number, because 215066042451 - 2¹ = 215066042449 is a prime.

It is not an unprimeable number, because it can be changed into a prime (215066042459) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 919085535 + ... + 919085768.

It is an arithmetic number, because the mean of its divisors is an integer number (27878931444).

Almost surely, 2^215066042451 is an apocalyptic number.

215066042451 is a deficient number, since it is larger than the sum of its proper divisors (119481134877).

215066042451 is a wasteful number, since it uses less digits than its factorization.

215066042451 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1838171322 (or 1838171319 counting only the distinct ones).

The product of its (nonzero) digits is 57600, while the sum is 36.

The spelling of 215066042451 in words is "two hundred fifteen billion, sixty-six million, forty-two thousand, four hundred fifty-one".