215288742 has 8 divisors (see below), whose sum is σ = 430577496. Its totient is φ = 71762912.

The previous prime is 215288729. The next prime is 215288761. The reversal of 215288742 is 247882512.

215288742 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

215288742 is an admirable number.

It is a self number, because there is not a number n which added to its sum of digits gives 215288742.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 17940723 + ... + 17940734.

It is an arithmetic number, because the mean of its divisors is an integer number (53822187).

Almost surely, 2^215288742 is an apocalyptic number.

215288742 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

215288742 is a wasteful number, since it uses less digits than its factorization.

215288742 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35881462.

The product of its digits is 71680, while the sum is 39.

The square root of 215288742 is about 14672.7210155445. The cubic root of 215288742 is about 599.3407035902.

The spelling of 215288742 in words is "two hundred fifteen million, two hundred eighty-eight thousand, seven hundred forty-two".