215630742 has 16 divisors (see below), whose sum is σ = 433198080. Its totient is φ = 71554152.

The previous prime is 215630717. The next prime is 215630743. The reversal of 215630742 is 247036512.

215630742 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (215630743) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 79242 + ... + 81917.

It is an arithmetic number, because the mean of its divisors is an integer number (27074880).

Almost surely, 2^215630742 is an apocalyptic number.

215630742 is an abundant number, since it is smaller than the sum of its proper divisors (217567338).

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

215630742 is a wasteful number, since it uses less digits than its factorization.

215630742 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 161387.

The product of its (nonzero) digits is 10080, while the sum is 30.

The square root of 215630742 is about 14684.3706708868. The cubic root of 215630742 is about 599.6578994268.

The spelling of 215630742 in words is "two hundred fifteen million, six hundred thirty thousand, seven hundred forty-two".