215254642 has 8 divisors (see below), whose sum is σ = 329751936. Its totient is φ = 105337332.

The previous prime is 215254639. The next prime is 215254643. The reversal of 215254642 is 246452512.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (215254643) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1144878 + ... + 1145065.

It is an arithmetic number, because the mean of its divisors is an integer number (41218992).

Almost surely, 2^215254642 is an apocalyptic number.

215254642 is a deficient number, since it is larger than the sum of its proper divisors (114497294).

215254642 is a wasteful number, since it uses less digits than its factorization.

215254642 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2289992.

The product of its digits is 19200, while the sum is 31.

The square root of 215254642 is about 14671.5589492051. The cubic root of 215254642 is about 599.3090583418.

The spelling of 215254642 in words is "two hundred fifteen million, two hundred fifty-four thousand, six hundred forty-two".