215135770 has 16 divisors (see below), whose sum is σ = 387463680. Its totient is φ = 86005584.

The previous prime is 215135761. The next prime is 215135777. The reversal of 215135770 is 77531512.

215135770 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (215135777) 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, 16411 + ... + 26449.

It is an arithmetic number, because the mean of its divisors is an integer number (24216480).

Almost surely, 2^215135770 is an apocalyptic number.

215135770 is a deficient number, since it is larger than the sum of its proper divisors (172327910).

215135770 is a wasteful number, since it uses less digits than its factorization.

215135770 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12189.

The product of its (nonzero) digits is 7350, while the sum is 31.

The square root of 215135770 is about 14667.5072865160. The cubic root of 215135770 is about 599.1987174238.

The spelling of 215135770 in words is "two hundred fifteen million, one hundred thirty-five thousand, seven hundred seventy".